Yes the 802 share ALL accessories and cables with the 901 and their form factor is identical. Will use the same UI and firmware also.
The key differences are:
- Dual wm8740 DAC instead of dual ess9018 on 901
- normal POT vs the high quality stepped attenuator on 901 (some may actually prefer this over the stepped approach for usability, though sound quality suffers)
- grayish blue (or bluish gray) vs black on the 901
Sound quality may not suffer due to the POT (though I'm sure the 901 is better for other reasons) but channel tracking certainly should and with the gain of some of the output cards, more so. Much of the best sounding kit in this world still use POTs. Tracking is a form of quality so I'm not disagreeing, just saying that there's nothing sonically lacking in a good pot compared to discreet resistor one other than tracking.