I’m 6ft 1 & 3/4”, and ended up with an XL. I have had 4 Stumpys in Large, and then a Trek Rail in Large.
The Rail was slightly bigger than my current Stumpy, and I found it more comfortable to ride and more stable downhill.
I test rode a Large SL, but opted for the XL for the extra length. Easier to make a big bike smaller than a small bike bigger!
Bear in mind, the difference is only something like 25mm!