Most cam manufacturers specify a power band with their cam specs as most people wouldn't understand exactly what all those numbers mean, but to compare and explain.
The MACE Comp Cams stage 2 cam specs are 216*/216* on a 111 LSA with .507" valve lift
The Crow stage 2 cam specs are 201*/206* on 113 LSA with .440" valve lift
As can be seen above, the Comp Cams stage 2 cam has more duration and a smaller Lobe Separation Angle (LSA), what this means is that there is more overlap (when the intake valve starts to open and the exhaust valve hasn't closed yet). This results in some loss of cylinder pressure at low engine speeds and requires more rpm before the engine starts to make good power (as experienced above when the engine seems to kick in at about 2500rpm, bumping up the compression ratio would help get back some of the low rpm power loss and improve the gains through the rest of the rev range).
The standard V6 cam has even less duration and larger LSA then the Crow cam above which means the engine will start to produce good power at lower revs but also nose over sooner. If you want a cam to produce good low RPM power then choose one with a small duration lobe and wide LSA, you can also go for a slightly larger duration lobe but you would want to increase the LSA as well so the overlap doesn't increase.
there are many factors in choosing a cam, ideally you would spec your cam to suit all the other engine specifications, rpm, head flow
The other important thing to consider when choosing a cam is the compression ratio, a big cam with a low compression ratio will be a pig and will need more revs before it starts to make power where as a smaller cam will behave much better and won't need as many revs before it starts to make power.
Please don't hesitate to ask if you have any more questions.
Bart
