Thanks so much for reading and for the question!
This is a tough call and some of it will come down to what you appreciate more in your audio, but I’ll do my best.
For me, the Revolver/Revolver S justify their slight price increase over the other Cloud models. The bass is a little more satisfying, and there’s more energy in the upper mids, leading to a more natural and musical sound. The soundstage is also a bit wider on the Revolver models.
However, the original Cloud has a very smooth and neutral bass response, and a bit of artificial sparkle in the highs. That sparkle might not be to everyone’s taste, but I find it satisfying on certain songs. The original Cloud also has a slight dip in the upper mids which leads to a hollow sound at times…but can also help prevent fatigue in longer listening sessions.
So overall, I think the Revolver is the better choice and worth the few extra dollars, talking purely on sound quality. If you don’t need the surround dongle the Revolver S comes with, the original Revolver is nigh-identical and cheaper.
Do you specifically need the boom microphone and other gaming headset features these two models include? If not, you should also check out the Sennheiser HD 598Cs in the same price range. Its detachable cable makes it a little bit more portable/easy to store. And its in-line mic will work in a pinch for gaming chat. Otherwise, both the Cloud and Revolver models are great choices, and I think they’re priced in a way that represents their quality. Hope that helped you out!