Here's what's available in M18 Fuel.
2653-22 - 1/4" Fuel hex - 133 ft-lbs., quick change hex
2654-22 - 3/8" Fuel COMPACT - 200 ft-lbs., friction ring
2655-22 - 1/2" Fuel COMPACT - 210 ft-lbs., pin detent (don't get this one for home use)
2655B-22 - 1/2" Fuel COMPACT - 210 ft-lbs., ball detent
2763-22 - 1/2" Fuel HI TORQUE - 700 ft lbs/1100 ft-lbs reverse., friction ring
Note that the compacts are available in -22CT versions as well, which is $70 cheaper but less battery runtime (and the battery is 1/2 the weight). I use the compact batteries almost always on my the compact impacts, and they last a very long time. No reason to lug the extra weight around, just always have the second battery sitting on the charger ready to go.
The 2762 is a pin detent as well, avoid that. The 2764 is 3/4" drive friction ring, does 1200 ft lbs, but is 3/4" drive. 2765 is 7/16" quick change hex, which is for giant drill bits and such.
The 2763 is great when you need big power, I just don't need it that often, so it collects much dust.