I have the Nano, and have shot the Carry.
The Nano has the rounded trigger guard-the new carry has the squared like the Glock.
The grip is different. The Nano has the finger rest on the grip and has more space.
The New Carry has the large Serrations on front and back.
Grip has a more pronounced beavertail.
Basically they are the same gun but there are differences in the parts. Very subtle and I assume for the difference in the slide lock.
Some shooter say they feel as if the New model shoots with a little less recoil. I did not notice this. But the Nano is one of the most mild shooting Micro 9's made, so not sure that matters.
The New Carry has a slide lock
**Note the Nano and the Carry can interchange grips and magazines. Some like the Carry receiver with the Nano Grip and vice versa.
**There are good deals now with the Nano since the Carry is out. Choosing between the two is going to be a individual call. Again, I actually prefer the Nano but that could be because I have a lot of round through one and just use to it. I might get the Carry down the road. But have two Nano's now and am happy.
If Beretta sells the Carry Grips since it is a modular system, I will probably just by a grip to try out. Nano grips cost about $40.00.
Notice how you can mix and match
Parts: courtesy Beretta1546