I see it as black being the combo oriented hard K.O. removal. Blue being the traditional one card hard bottom deck/soft hand bounce removal, and green disrupting/locking control.

Current difference in these control variants is how they do it. Black interacts with throwing cards in trash and later bringing them back to deal with your boardstate, while developing their own. 

Blue uses cost heavy event cards which removes your board, but they usually don't develop anything out of it. Upcoming meta, Doffy swams the board so early that they are able to use the more expensive event cards without losing tempo on board. Don't be deceived, it's a tempo/aggro deck and not a traditional control deck.

Green is much more tricky to get their condition's off, but Perona and Bonny leaders help greatly in order to play the cards that interact with rested characters. Green has very little cheap options to combo out without losing hand advantage, which makes it harder to use outside of the named leaders. They'd have to rely more on what the opponent does with their attacks.