> Yes the uber units were different but in actual gameplay these weren't used at all.
That's not completely true, but it is true that they're not hugely common to use: because of their price, misusing them will likely break you, whereas using them does not usually have an absolutely critical impact on the game. They may be slightly more easy to use in pair games.
> If there were other noncosmetic differences, this wasn't apparent to me as a casual player.
Nope, there aren't, probably to avoid the balance issues of e.g. Hero Academy.
That's not completely true, but it is true that they're not hugely common to use: because of their price, misusing them will likely break you, whereas using them does not usually have an absolutely critical impact on the game. They may be slightly more easy to use in pair games.
> If there were other noncosmetic differences, this wasn't apparent to me as a casual player.
Nope, there aren't, probably to avoid the balance issues of e.g. Hero Academy.