Yeah, normally I wouldn't, but there was only about 4000 miles on the tire, so there's not that much difference between the two, and I replaced it with the identical brand and model of tire, so I'm quite certain that that's not the cause of a vibration this strong, unless I bought a defective tire.

Progress note: I did buy the new tires and have then rotated to the front, but in Guadalajara, there aren't any roads where I can get up to 50+ mph, so I'm having to wait until I can get out of the city to test. The guy who changed the tire thinks I have a broken motor mount, so that could also be the cause of the vibration for sure. I'm going to try to test before I replace the motor mount so I can figure out for sure.