I still have my L48 R1, never tried the X-hot, and currently use the L81 G20.
Legends/TLs have a June tournament on RSG back 9 with no wind. I have been using it to try clubs and balls to see how they perform, and to try different amounts of spin (top and back), and no spin. Primarily I use the L71 Nike balls. With them, I found the L48 R1 to prefer half bs -> fbs. I was getting ~290yds or so with half bs. With top, less. I have a friend using the same G20 driver you currently have (he is TM), and his drives typically come up shorter than the R1.
When I made Legend, I was still shy of L81 and the upper level G20 driver. For most of the courses, I could struggle by with the L48 R1. However, get a decent headwind on some holes, and par would become a struggle to attain. Hole 15 & 17 STA and Hole 18 Merion are three examples; Hole 15 STA is a long par 4, and with a good headwind I still have to lay up to the strip of fairway to the left for my second shot, green for my third, and I better be on my game to save par if that third shot goes awry at all. Hole 17 STA (hotel) is tough with a headwind, and if you get the back left pin placement, the approach can be murder, might have to lay it up. Merion 18... good headwind, and the fairway sloping toward you is where I land. Cannot get over it, guaranteeing a long approach, protected by a nice bunker in front.
I would rent the X-Hot and R1 and hit STA back 9 until you get a good headwind on hole 15 and 17, and see which club serves you best. Another pain will be not having a high enough lofting driver to clear trees on courses like Olympic and CCC, especially with tough wind directions. IMO, Legend requires a player to spend more "head time" and practice time figuring out certain holes all over again. It is a LONG way to the equipment that will make teeing off anywhere close to as easy as when playing as Master/TM (IMO).