Shark7752:
It's a nice upgrade and the price isn't too bad if you sell your TM. I made the same jump and may stick with this Nike driver from here on, don't want to pay 40 bucks for 5 more yds.
I bought the L74 M1 some time ago, thinking the Nike driver (was L85, now L80) was out of reach. Once the level drop happened, I got the Nike. I find the Nike to be about 10 yrs longer and a bit more accurate when hit on, or very near, ding. But the dispersion (spray) off-ding is much greater on the Vapor than the M1 -- and more than I would have expected. Also, I seem to get a lot more head-scratchers with the Nike.
All things considered, I'm happy with both purchases and keep switching between them. To sum up: M1 more forgiveness, more roll, less carry, slower meter; Vapor more precision on good strikes, more carry, more distance.