I do not know when Kubota began to offer the SSQA nor the other mfrs. I know that by 2011 nearly every Kubota on every dealer lot in Maryland, Virginia and WV plus a few i noticed in PA and the Ohio Ag Show had SSQA on them while essentially none of the Deeres did. At the 2012 PA Ag Progress Days all Kubotas there had the SSQA and the MF did not. I was more impressed by what was made, delivered and on the lots than what was in the catalogs. Don't know what an SE model is.
At least in MD, VA, WV and the parts of PA and Delaware I visited, Kubotas were the first to be on the lots with primarily (most of the ones on the lots) with SSQA rather than the proprietary pin designs. That was among Deere, Massey, New Holland and Kubota. That was the basis for what I said. I thin that was wise and I think the entire industry will end up there. Just too many goodies are available with the skid steer interface.