I have seen posts on other forums where OEM filters long and short were cut away....... to reveal the square area of the filter medium was the same, and in one case, the shorter filter had a touch more..... so we need one of you studs to cut open one of each and post up (I use aftermarket filters, NEVER a Fram).
Well, now, if you've ever worked in a manufacturing environment, that makes perfect sense. The filter element would be assembled elsewhere and inserted in the can. But it would make no sense, from an economical standpoint, to make a separate element for every different can. It's quite likely that one length element would fit more than one can across a small range of lengths.
I've got the short Yamaha filter on my bike now. Based on my summer schedule, I'll put the long Yamaha filter on it in June. Then in late August or early September I'll remove the long one. If you'd like to volunteer to do that experiment, I'll send them both to you