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For enhanced safety, the front seat shoulder belts of the Mazda 6 are height-adjustable to accommodate a wide variety of driver and passenger heights. A better fit can prevent injuries and the increased comfort also encourages passengers to buckle up. The Cadillac CT4 doesn’t offer height-adjustable seat belts.
The Mazda 6 Signature has a standard 360-degree View Monitor to allow the driver to see objects all around the vehicle on a screen. The CT4 only offers a rear monitor and front and rear parking sensors that beep or flash a light. That doesn’t help with obstacles to the sides.
Both the Mazda 6 and the CT4 have standard driver and passenger frontal airbags, front side-impact airbags, side-impact head airbags, front seatbelt pretensioners, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, daytime running lights and rearview cameras.
For its top level performance in IIHS driver and passenger-side small overlap frontal, moderate overlap frontal, side impact, roof strength and head restraint tests, its standard vehicle-to-vehicle front crash prevention system, its standard vehicle-to-pedestrian front crash prevention system, and its standard headlight’s “Good” rating, the Insurance Institute for Highway Safety grants the Mazda 6 its highest rating: “Top Pick Plus” for 2020, a rating granted to only 30 vehicles tested by the IIHS. The CT4 has not been tested, yet.
J.D. Power and Associates’ 2019 Initial Quality Study of new car owners surveyed provide the statistics that show that Mazda vehicles are better in initial quality than Cadillac vehicles. J.D. Power ranks Mazda 12th in initial quality. With 6 more problems per 100 vehicles, Cadillac is ranked 17th.
J.D. Power and Associates’ 2019 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that Mazda vehicles are more reliable than Cadillac vehicles. J.D. Power ranks Mazda 21st in reliability. With 7 more problems per 100 vehicles, Cadillac is ranked 23rd.
From surveys of all its subscribers, Consumer Reports’ December 2019 Auto Issue reports that Mazda vehicles are more reliable than Cadillac vehicles. Consumer Reports ranks Mazda second in reliability. Cadillac is ranked 30th.
The Mazda 6 Grand Touring/Signature’s standard 2.5 turbo 4-cylinder produces 13 more horsepower (250 vs. 237) and 52 lbs.-ft. more torque (310 vs. 258) than the CT4’s standard 2.0 turbo 4-cylinder.
To lower fuel costs and make buying fuel easier, the Mazda 6 uses regular unleaded gasoline (premium recommended on Mazda 6 Grand Touring/Signature for maximum performance). The CT4 requires premium, which can cost 20 to 55 cents more per gallon.
The Mazda 6 has a standard space-saver spare tire so you can replace a flat tire and drive to have the flat repaired or replaced. A spare tire isn’t available on the CT4; it requires you to depend on its run-flat tires, which limits mileage and speed before they are repaired. If a run-flat is damaged beyond repair by a road hazard your vehicle will have to be towed. Some tire options on the CT4 don’t have a run-flat feature, either.
For a smoother ride and more stable handling, the Mazda 6’s wheelbase is 2.1 inches longer than on the CT4 (111.4 inches vs. 109.3 inches).
For better handling and stability, the average track (width between the wheels) on the Mazda 6 is 2.3 inches wider in the front and .5 inches wider in the rear than the track on the CT4.
For better maneuverability, the Mazda 6’s turning circle is .4 feet tighter than the CT4’s (36.7 feet vs. 37.1 feet). The Mazda 6’s turning circle is 1.3 feet tighter than the CT4 AWD’s (36.7 feet vs. 38 feet).
The Mazda 6 (except Sport) offers available computer-generated active noise cancellation to help remove annoying noise and vibration from the passenger compartment, especially at low frequencies. The CT4 doesn’t offer active noise cancellation.
Because it has more passenger and cargo room, the EPA rates the Mazda 6 a Mid-size car, while the CT4 is rated a Compact.
The Mazda 6 has 9.7 cubic feet more passenger volume than the CT4 (99.7 vs. 90).
The Mazda 6 has .1 inches more front headroom, .5 inches more front hip room, .7 inches more front shoulder room, .6 inches more rear headroom, 5.3 inches more rear legroom, 1 inch more rear hip room and 1.2 inches more rear shoulder room than the CT4.
The Mazda 6 has a much larger trunk than the CT4 (14.7 vs. 10.7 cubic feet).
The Mazda 6’s front and rear power windows all open or close with one touch of the switches, making it more convenient at drive-up windows and toll booths, or when talking with someone outside of the car. The CT4’s rear power window switches have to be held the entire time to close them fully.
The Mazda 6’s rain-sensitive wipers adjust their speed and turn on and off automatically based on the amount of rainfall on the windshield. This allows the driver to concentrate on driving without constantly adjusting the wipers. The CT4’s standard manually variable intermittent wipers have to be constantly adjusted.
The CT4 Premium Luxury/Sport’s optional cornering lamps activate a lamp on the front corner when the turn signal is activated. The Mazda 6 Grand Touring Reserve/Signature’s standard adaptive cornering lights turn the actual headlight unit up to several degrees, depending on steering wheel angle and vehicle speed. This lights a significant distance into corners at any speed.
Both the Mazda 6 and the CT4 offer available heated front seats. The Mazda 6 Grand Touring Reserve/Signature also has standard heated rear seats to keep those passengers extremely comfortable in the winter. Heated rear seats aren’t available in the CT4.
Consumer Reports® recommends the Mazda 6, based on reliability, safety and performance.
The Mazda 6 was chosen as one of Car and Driver’s “Top Ten” for 2 of the last 7 years. The CT4 has never been a Car and Driver “Top Ten” pick.
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