I see a different shape to them. Fused plays a bit sharper and more of that asymmetric hook-set motion. Intense Fire seems to play a bit more rounded and continuous as well as gets a bit farther down the lane.

Oil handling wise, I would put them really close, but shapes differ. If you already have a variety of equipment then I could see the addition. If you only have a Fused or Fire, then I would say the money would be better spent on something else.