Main ring means classes that are not sport horse or any of the ww events. "Main ring" classes exist at all levels of arabian shows. Its really a slang term.
Is there that big of a difference in SH Hack VS MR Hack?
Boy is that a loaded question!!
'09 SHN: hunter and dressage types BOTH were used in the TT. The class is to be judged on differences in gaits: not just speed or height of action. So quite frankly ANY horse should be able to judged doing this.
'11 SHN: all I saw win were english horses. I am talking about no hunter types but main ring show hack types that are english horses: VERY fancy high knee movers. IDK if this was just what the judges were looking for that year or if its really changed in sport horse but that is my opinion of what I saw.
I expect english horses to win main ring as I think of it as an english class but sport horse encompasses hunters too and I was disappointed those judges did not place any hunter type movers despite obvious differences in gaits that I saw anyway.