Live arbs represent bets on live events. Live events are matches that you may bet during the game on. As odds are changing rapidly, Live has pros and cons.
Pros: a hundred times more arbs, ten times less bookmaker sanctions, way faster bankroll return.
Cons: Odds are changing quickly so newbies make it hard to catch up with the speed.
Prematch arbs are bets on future events. Newbies are advised to start from this kind of surebets as it is much easier for beginners to work with them.
Pros: Odds are changing slowly, great number of future events, and consequently, lots of surebets.
Cons: Competition is pretty high because of simplicity. Thus, bookies limit maximum stakes.