For me, I just can't understand the price difference between engine A and engine B.
Both can have 1.45hp @ ~41,000rpm...both have the same useable power band etc...
...but one will cost $149-$159 and the other will come in at $300+
But when I think about it, the same holds true for just about everything in RC. You can buy a Corally Assassin for $310 and go just as fast with a $189 Xray T1R. Buy a Hara Twister for $250+ or go just as well with an identical $179 Quatum Comp.
I guess it all comes down to what your willing to pay.