Why are non-Accel HD systems not listed as approved for 10.3.10?

I'm doing a new install of ProTools 10 HD on Mountain Lion 10.8.5, an HD2 system, and trying to decide between PT 10.3.8 and 10.3.10... is there some reason pure HD systems are not listed under 10.3.10? Only Accel is listed. Also, any real world reports of stability for 10.3.10 vs 10.3.8 would be appreciated.