I own both, actually, a F55e (updated version of F50R) and a SJ200, both 2017 models. Although they are both jumbos, I wouldn't say one is better than the other, just different. Obviously the b/s will give a different tonal flavor to each, and as others have said, a better comparison would be a SJ200 vs F50. That said, both have their strengths.
The SJ200 is iconic and I personally love the way it looks. It also feels really good, the waist just sits perfectly in my lap and the nut width is a very comfortable 1 23/32. Its an awesome strumming guitar and has a very "hi-fi" sound due to its maple b/s. Of all my guitars, its the one that gets the most praise from listeners, both in sound and looks.
The F55 on the other hand is also beautiful but has a really powerful low end (probably due to the RW b/s). Its also very loud, more than the Sj200. Its my favorite guitar for alternate tunings, drop D, open D, etc. It has a particular woody sound and sustains for days. Nut width is a tad narrow at a true 1 11/16.
I think both have their place. The only thing I would say the SJ200 has over the F55 is resale value. Probably the only guitar I have that's worth more today than when I bought it (mind you, got a really good deal)...