Yes, I see more variation with blood trails in terms of where the shot placement was, and other things, than I do with the type of broadhead.
I've mentioned it on this forum plenty before, but I'm red/green colourblind (and get some other colours mixed up, too) so I don't pay attention to blood trails, unless they're obvious and in that case I just find it interesting.
Sure, I've lost some animals, like anybody, but the type of blood trail I hope or expect a broadhead to create literally NEVER comes to mind when I'm deciding on a broadhead. For me, I just want it to fly well, be fairly sharp, be durable, and then have it be fairly affordable.
I see Iron Will released their new broadhead yesterday. It looks fantastic, and similar to the Kayuga Pilot cut and a few other broadheads that have been around for a while. I'd be somewhat interested in giving them a go if they weren't so expensive. That's not to say they aren't worth it either, but I lose more broadheads to long grass each year than I care to think about, and having those broadheads cost three times more than the ones I'm currently using would hurt. Are they 'better' than the ones I'm currently using? Potentially? Would I be able to measure or tell the difference? Likely not. What about the animals? Again, I'd say likely not.