I have owned several of both. The difference is the outer shell that all manufacturers have to use for ASA. I believe Miken calls it a durashell? It is what causes the bat to have the spiral cracks. The SRV3 does not have that. When a SRV3 cracks it will most likely shark tooth but die slowly. The SRV6 has the spiral cracking....which I can only assume is from the new design that seems required for ASA, at least to me. Before this year, I had never heard of nor seen the spiral cracks but they were everywhere on this years ASA bats regardless of the manufacturer. So, while I can not tell you with 100% certainty what the exact differences are, I can say with 100% CERTAINTY that they are NOT the same bat with different paint jobs. They are both good bats, but the SRV6 needs much more BP and mine didn't get good until the outer shell finally spiral cracked. Now it's pretty good lol. Also while the SRV3 does make a slight vibration sound if dropped right, the SRV6 is much more pronounced. Hope this helps, and this is all speculation based on recent and past expierences.