I think both games are at a similar point, though SoA is slightly ahead in the NTS route after the recent update, in my opinion. That said, both games tend to lean more toward NTS than NTR when it comes to the MC and FMC. Aside from other characters like Sai getting cucked by Ari in The Afterparty update, lol. I'm sure whatever Abyss does with Rob and Sophie will have its own flair for NTR content. If you're looking for NTR content between the MC/FMC, I don't think it's going to happen in either game, but I could be wrong, though.