To answer your question simply, Yes.
However it is very easy to make a wide frame blade mount work for a quick attach narrow frame, I have converted several. If you have a welder and some 1/4"x 2 flat iron and some rod laying around you can convert them in 30 minutes and its cheaper than driving around looking for the right one. Converting a narrow frame to wide is more work but still possible. I had bunch of blades, chains and weights that I needed to clear out of the shed, both wide and narrow. Advertised them the day we got 12" of snow back in January and could have sold 20 more, LOL.