Personally, I don't think there are any.  The difference in agitation is glaring.  I prefer the steady, assured rhythm of Maytag's long stroke action over the the unnerving Tourettes syndrome twitching of the orbital.  This applies to other makes besides Maytag, such as the direct drive system that replaced Whirlpool's belt driven design.

I snagged this orbital Maytag last year, used it regularly and liked it very much.  Simple and efficient, it was much better than I'd expected having only had the long-stroke Tags before.   I took it over to my nephew's for use in a houseful of 20'ish guys he's sharing a house with.  So far, it's performed perfectly though I got a question within a week: "is it supposed to be this fast?"  Yes, it sure is...

Greg, that one-speed wonder looks like the perfect uncomplicated machine for a houseful of 20-ish dudes who likely don't have the slightest clue about making their own decisions, pushing buttons and turning knobs.

LOL - you may be right.  I prefer to not think about the (ab)use the machine is enduring now, the satisfaction of giving to the cause of young adults striking out on their own for the first time will have to be enough.