It's generally a tradeoff for recording time as you've noted. Not particularly "clarity", just can enable higher fidelity (things like snr, wow & flutter and frequency response). Depends how it's actually used, but generally an advantage to put less content on vinyl and/or increase the speed. I haven't bought new vinyl in something like 25 years so really doesn't matter to me, I'll take the inherent higher fidelity of digital and just use the vinyl for nostalgia....and not have to worry about getting up to to flip the rather short playing vinyl in a general sense.