I don't like Axial, they are cheaply made and poor performers. My second Axial just seized the main bearing at 2 gallons. The inside of the engine was immaculate, no dirt, no detonation marks, no fuel stains... nothing. It just let go. That's the second time. What's your budget? You can buy a lot better quality with more power for relatively the same price. The LRP will smoke the Axial, so will a Sportwerks .26. The Axial was aimed at monster trucks, it makes decent power at lower rpms but has nothing on top end.
The Sportwerks .26s are extremely quick, they have just as much power on bottom as the Axial but keep pulling the higher it revs. The LRP is good too but it s a bit too much for a buggy unless you just bash. Then it is perfect.