As JD said, it’s iffy. The only way to know for sure would be to buy one and try the Hub Replace Feature. If you encounter a memory error, you could always reset it and return it. Keep in mind that the V3 hub has half the memory and half the CPU of the V2 hub. With 87 devices, you should be fine, though. If the Hub Replace Feature works, you could always go back to the V2 if you experience performance issues by using the feature again to switch back to the V2.
I’ve done both a migration from a working hub to a different hub and a test when the original hub fails.