IPS’ main advantage over TN is viewing angles, they also might look less washed out, but that is not a given.
My previous monitor was a 27" 144Hz 1440p TN display, and my current has the same specs but is an IPS display, both calibrated. For a desktop monitor positioned right in front of you I find the difference smaller than som IPS evangelists would have you believe.
All things equal, I would pick IPS, but given the two options presented here I wouldn’t even consider the IPS one.
Hmmm, the washed-out look is going to be a major problem. Might just go with the IPS to be on the safe side, especially considering most of the games I’ll be playing won’t be able to be pushed past 80fps anyways.