Toddster, I think most any bow that draws 5# lighter will feel more like butter. The lighter I go, the more buttery they get.
I've shot a ton of different Hill and Hill style bows, and PAVAN's thoughts about tiller and design seem valid. Some bows are finished and just have IT, and others miss the mark. I've had identical bows from the same bowyer, and they feel totally different, and shoot that way too.
It's not always the species of wood. Of the Howard Hill line, IMO the Wesley is their top dog when i compare it to the Cheetah, Redman, and Big 5. I base that on owning and shooting them. The tiller and bamboo seem to outperform the rest in feel at every point, drawing and shooting. Tiller a 5 lam Redman the same way, with the same limb lam tapers, and who knows, maybe it's the same. That's ONLY with HHA bows.
Overall, I've not noticed a significant difference in arrow speed or where the arrow goes with most any of them. The only one that Ive shot and is definitely slower, but is a pleasure to shoot, is the Miller Split Bamboo. Take the glass away and WOW. That bamboo is smooth.
Turay did some sort of measurements of densities of species of wood. He said the really dense woods seemed to add hand shock, like Osage in the core, but most of the woods, and bamboo, had really close properties. Ash, elm, maple are all really common solid core woods, and bamboo of course, and I know he uses some of these a lot.
A friend was saying how smooth one of his Hill style bows was compared to another, from another bowyer. When he put them on the scale, they were marked the same but the one was heavier than marked and gave him the feel of a tougher draw, which was true in fact.