power?
"more powerful"??
Most all hot saws are designed for a specific race. if your cutting 10" wood or 18" wood the same set of chains/tourqe/RPM ratio's are not going to perform equally. When you talk about a race that has 5-8 guys within one second the operator is a big part of the equation . Alcohol modified stock saws run very well on 10-12" wood with multiple cuts because you can run lighter saw with high chain speed. once you get up around 18"+ and you need more tourqe, the race is longer so saw weight is less important. all this being said i am far from being an expert. I travel a lot and see many guys making developments in many different areas. chain-bars-filing-alcohol-gas additives. there are so many combinations that running race saws is a full time job. you will notice that most "saw guys" are changing things constantly. when someone suggest they have "the fastest saw with the most power" it really means nothing. there are 6 and 8 cylinder saws out there claiming to be the "fastest". they are: one cut down, hot start.
my point: pick a race that is common in your area and build you saw to suit. one saw will not fare well in multiple events due to the drastic variety of events.
ramble ramble ramble, etc, etc.
D