Actually Bitcoin.com mines with BU. As it is only Coingeek seems interested in SV, which makes sense since theyvpsif for it to be developed.
Today, yes they mine w/ BU but On Nov. 15th who knows? they pay 98% block reward to their investors so they cannot afford to lose $$ in this. Also BMG Pool is nChain
At the Bangkok miner's meeting, it seemed obvious Roger is no fan of CSW and probably by extension, SV. I think Roger is No-Upgrade or ABC-Spec. But No-Upgrade has no traction so...
Not yet anyway. BU supports ABC's changes but not SV's. his silence speaks volumes IMO...honestly it makes no sense to reveal which side he will mine given their ~8% hash