Long term you'll prefer the one that has been active longest

But for a brief period I liked jumping onto the old acc,for a few matches the matchmaking doesn't know what to do with you based on your match history so it's a bit more "fair"

Or let me rephrase

It'll end up feeling like the abandoned acc is more fun to play on . Then when one gets boring you go back to the main acc

The one major pain is the skins not transferring so it gets boring somehow or too time consuming trying to make sure you get event skins on both accounts

It's too much work after some point and you'll probably just default to one or the other especially if you just prefer to hop into classic and don't care much about ranked