You might as well go for the HFR. You've done the 2D already, you may as well attend a screening of a format that you've not seen before
. If you do see it in HFR, come back in and let us know if you preferred that, or 2D.
That's the thing, though, I've never seen any
kind of 3D film.
I gather some people have problems watching in 3D (nausea etc) so I don't know if I'm likely to find it uncomfortable. In which case, does the HFR increase or lessen the discomfort?
My eyesight isn't what it was and I have to use specs for reading and close-up stuff - I don't know if that's relevant.