SRAM brifters, rear D, etc...

[ccf]

So what you want is Rival22+ GX-RD-2x10.

Is the cog spacing of the SRAM XG cassettes the same as the SRAM PG cassettes?

 

[ratz]

SRAM is the same if the number of gears is the same all 11SP, 10SP, 9SP, 12sp are compatible

 

[ccf]

SRAM is the same if the number of gears is the same all 11SP, 10SP, 9SP, 12sp are compatible

Does the chainring pitch matter? Could I use cranks that I've been running in a 10-spd configuration with an 11-spd cassette?

 

[ratz]

Does the chainring pitch matter? Could I use cranks that I've been running in a 10-spd configuration with an 11-spd cassette?

Not enough to matter. BB offset matters more