The Razor 3+ is a solid shoe. It seems to be similar to the Turbo in terms of softness and energy return, but the drop is much lower. It is only 4 mm. So might take some getting used to the change in drop.
Razor 3 is nice. It’s very different in a lot of ways, but it is a fast shoe. Depending on how much you weigh, the midsole foam will compress faster than the turbo 2. If you weigh 150 lbs+ you will probably only get 200 or so good miles out of the razor 3.
I think if you’re going to go the route of razor 3 you should just hit up eBay for more Turbo 2’s.
The only reason to not go that route would be just because you want to try something new, and that’s fine, but my advice is if you like something, and it’s working, stick with it!