Certainly, to a degree, what is far more important than speed is a straight flying arrow and a suitable broadhead. I know a nontradganger that has killed a few elk with a low 50s longbow throwing less than 170 fps 520 grain 27"cedars with Hunterheads and Grizzly broadheads. He had the arrows coming out the other side of the elk every time so far. If you by rare chance have two bows that shoot and feel the same except one is 10 or 12 fps faster, most would prefer the faster bow. Throw something into the mix that would make that faster bow less accurate or easy to shoot, most would pick the better feeling bow. Power comes in stages, depending on the broadhead and arrow and what you expect it to shoot through. Lets take a real slug, a 37 at my less than 27" Cheetah, an uphill 18 yard shot at a fat doe with a skinny but heavy wood arrow pushing a 140 grain Hill. The arrow was in the next corn row and the deer went down at the edge of the woods maybe 125 yards away. It was not the power of the bow, certainly not the power in my drawing arm that had a muscle nearly torn in half earlier in the year, it was that straight flying arrow with an easy penetrating head, it perhaps helped that I only skidded off one rib with the hit. I have hit lots of ribs and shoulder blades when shooting from the ground, they seem fairly easy to shoot through. The next power level would be the shoulder joint, that is a big jump requirement for arrow, broadhead and bow. Even when I shot deer with an 85 pound bow, I did not want to hit the shoulder. It is a questionable messy hit that can involve a lot of tracking on a painfully injured deer, once was more than enough for me. After an all day trailing job, I was thinking a bounce off would have been better. It took a second arrow to finish the deer and I felt awful for it.