No difference I'm aware of. The left/right pair come with A/B serial numbers whilst the VC (obviously) doesn't.

The different part numbers merely serves to tell M whether they're selling a pair or a single.

Sooloos, Roon, G series (with LPS upgrade), 800 series (with LPS upgrade), HD621, AC200, Prime and PS, DSPs old and new.

Purdeys, Moke, Leica, 'Blad. Only the best.