I highly doubt the frame mounting holes have been changed. Tooling like that is generally designed for life with no changes anticipated. It's every costly to change that kind of tooling during the production run. I have personally had both hitches on the bench and overall prefer the Curt. The Drawtite I had was bolted together in the middle. I sent it back and used the Curt so I can't comment on ease of installation. The metal seemed about the same for both. It was about 15 minutes to mount the Curt.
Regardless of what the manufacturer says the hitch can handle the Mirage has a GVWR of about 2910 lbs. (2020 model) so about 900 lbs. total load capacity, less driver, passenger, trailer weight, fuel, luggage, etc. My 8'x4' aluminum trailer is about ~250 lbs. with straps, spare, jack, tarps so subtracting me, fuel, etc I'm at GVWR with only 450 lbs. on my trailer.
I know the Mirage is not rated for a trailer of any weight but..... but if I have an accident while loaded to less the GVWR it might be hard to find me negligent considering Curt thinks a 2000 lb. trailer is OK. However, if I do haul a 2000 lb. (when loaded up) trailer that puts the Mirage at about 4220 lbs. GVWR, about 1300 lbs. OVER the Mits rating. That would be harder to dispute that it's not dangerously overloaded.