ok well tonight I got to shoot the xforce for a period of time. so I thought now I would share my thoughts.
speed- the xforce wins hands down
draw cycle- xforce is smooth the whole way through
back wall- synergy I like the hard wall
hand shock- synergy
Brace height- synergy the xforce slaps the **** out of me
Noise- synergy (but to be fair I did have an sts on it)
overall, both are nice bows, but I would rate the synergy ahead of the xforce. If you want pure speed then by all means go with the xforce. but other then that not really worth the $$$