In short, yes they are different.
There are two different types, short one for the 200's & longer for the 400's. The lift arms I believe are the same expect for 400 series after 1980 as they require a longer one as the frames on 1980's and after are a couple inches longer. There may be a difference too on the attachment pivots that bolt onto the rearends of the newer four digit models which I have heard, not personally seen. The pros may be able to give you the exact sleeve hitch models but I'm not up on the Case/Ingersoll model names, the parts manual for your model based on It's seriel number will give you the correct model number.
Short sleeve hitches can bolted on to the big wheel 400 series but the attachments such as a tiller will hit the rear wheels but if you have something else that sticks out it might work. Of course if a longer sleeve hitch on a 200, it will just hang out further on the back.
BTW - I came across a short sleeve hitch that is different than any I have seen in the parts books, it's side frame is made of flat steel insteed of angle iron and has no horizontal renforcement. This might be a early one that I read about in a Case tech bulliton which asks the dealers to weld the brace on to reinforce it.