I have had a fair bit of stick time on both planes, and they do fly surprisingly differently. The Xl is a real floater. Very lightly loaded, untouchable slow speed performance. I find the Elan to be more crisp and dare I Say it more precise. It is noticeably faster.
My own personal preference is toward the XL. I find it has a wider flight envelope. But I prefer the way the Elan looks. Also if I had a P-80 I know that I would have more fun with it in an Elan.
Just my thoughts
Regards Al