All of these cranks feature an 8-bolt interface and carbon fiber layup. The SRAM RED is the top of the line offering at $410, whereas the SRAM Force and Quarq DZero, which both share the same carbon layup, and are priced at $211. The SRAM RED and Force D1 are available in either DUB or GXP versions. The Force D2 and Quarq DZero are available in DUB only.
In addition, since these cranks all use the same 8-bolt interface, you can mix and match any SRAM or Quarq crank arm with any SRAM or Quarq power meter (just make sure the cranks and power meter are the current generation).
SRAM RED Crank Arms
Cost: $410
Versions: DUB and GXP
Lengths Available: 165 mm, 167.5 mm, 170 mm, 172.5 mm, 175 mm
Material: Carbon Fiber
Spindle Size: DUB: 28.99 mm | GXP: 22/24 mm
Weight: DUB 340 grams (172.5) | GXP: 402 grams (172.5)
Compatible with: SRAM DUB and GXP Bottom Brackets
Interface: SRAM 8-bolt
SRAM Force D2 Crank Arms
Cost: $211
Versions: DUB
Lengths Available: 165 mm, 167.5 mm, 170 mm, 172.5 mm, 175 mm
Material: Carbon Fiber
Spindle Size: DUB: 28.99 mm
Weight: 480 grams (172.5)
Compatible with: SRAM DUB Bottom Brackets
Interface: SRAM 8-bolt
SRAM Force D1 Crank Arms
Cost: $211
Versions: DUB and GXP
Lengths Available: 165 mm, 167.5 mm, 170 mm, 172.5 mm, 175 mm
Material: Carbon Fiber
Spindle Size: DUB: 28.99 mm | GXP: 22/24 mm
Weight: DUB 480 grams (172.5) | GXP: 504 grams (172.5)
Compatible with: SRAM DUB and GXP Bottom Brackets
Interface: SRAM 8-bolt
Quarq DZero Crank Arms
Cost: $211
Versions: DUB
Lengths Available: 165 mm, 167.5 mm, 170 mm, 172.5 mm, 175 mm
Material: Carbon Fiber
Spindle Size: 28.99 mm
Weight: 478 grams (172.5)
Compatible with: SRAM DUB Bottom Brackets
Interface: SRAM 8-bolt