I have a SC cable in dual 3-pin XLR too. This allowed me to listen via the rear XLR on the Hugo TT2 using short plug adapters instead of cable adapters.Not to answer for @DJJEZ , but here are my thoughts:
I have the dual 3 pin XLR and had the Formula S and now Wa33, but listened to the 4 pin xlr and if there is a difference - I can’t here it. Also, if you want to connect to an amp without dual 3 pin - you have to use an adapter which (sort of ) defeats the purpose of having the best connection possible. Last, I imagine the 4 pin has higher resale value.
I think the dual 3 pin is a marginally nicer cable because you get two of those beautiful furutech XLRs instead of one - eliminate the possibility of cable crosstalk - but practically, I think the 4 pin cable makes a lot more sense - and you're not giving up anything from a sound quality perspective.
Sometimes, I will plug one channel into the TT2 and the OTHER into the Formula S just for kicks.