Both are very nice bows. The Invasion is very forgiving, and quiet, not to mention quick. The destroyer 350 real fast, quiet, and not as forgiving of shooter form. But the D350 felt better to me. The balance was better. And I didnt want a speed bow. The CPX on the invasion moves to much weight to the rear so it wanted to tip back for me to much. Easy to fix with a stab, but it would take more weight, and my ow is a hunting bow. Also the Invasion had a touch more vibration than the 340 or 350. But all that takes is a couple mini limb savers. It comes down to what feels better to you.