No where have I mentioned why the two versions!
Standard packages are slowly being converted to PHP 5.3.0 however they may have issues.
For each application try this:
Initially install on 5.0 and test, they should work fine.
Directly copy installed folders across to 5.1
Copy the entire folder UniServer\usr\local\mysql\data to 5.1
If they work on 5.1 there are no compatibility issues.
All the best
Ric
