How To Figure Compression Ratio

The 255 cc stealth vs the 240 cc on the trick flow. Might sound better but the trickflow ports are a better designed port. The combustion chambers on trickflow heads are much better than stealth heads and the trickflow can be ported to max wedge, good luck with that in a stealth port.
Trickflow heads also come with higher quality parts such as valves, seats and springs out of the box