This is a discussion on a bit confused within the online poker forums, in the Poker Rooms section; When it says merge network has the same player pool, does that mean that weather you play on sportsbook or carbon you are playing against
The lobby that you'll see on one of the 'skins' (ie. Carbon, Lock, etc.) will be the same on the others. Note: if you're logged in one skin, you won't be able to play on the other at the same time.
(this is the same sorta thing on 'ipoker network', with Titan, myBet, WilliamHill, etc.)