I've used osage from IL, NE, KS and TX, most of which I cut. By far, the Texas osage is the worst, full of wind checks, tight ringed and twisted as all get out. Irregardless of state, the best osage for me has come from field hedges where it at some point was used as a live fence. There it grows close together and every now and then a tree will grow with fewer branches and straight up to get to the sun. Those make great bows. Having said that, I've made good bows from osage in every region. I don't even look at ring thickness or early/rate ratios. I find yellow wood and build bows. Osage has never let me down, though I've messed up and insects have sometimes conspired to ruin bows. I need to go cut me some more.
George