"Would anybody upload a comparison sound? Like some short jazz loop or so?"
Hell naw! HAHA The resampling feature on the XL TAKES FOREVER! This is the main reason why this function is often overlooked. It works fairly well on REALLY short samples, drums, but even in that case, I highly recommend that you delete any extra "air" off the samples before you try it. The results are actually much better than the 2500 with JJ, but it's the wait time that turns so many people away from using it. You can almost get SP-1200/S950 type of sound out of it, but you have to know frequencies and Hz to get the right tones out the sounds. It's not as easy as putting in "12bit, 22000hz" (or whatever) even though that's exactly what you are entering. I've tried it a few times before, and entering the SP-1200's specs didn't give me SP-1200 results..it actually chipmunked the sound more than anything, but it requires a lot of trial and error. Take a day off work and school. The processing time will take a while!

Just buy an EMAX-1/S950 and adjust the sample rates in there.