Which SSD wears faster: larger or smaller?

Basically they all wear at the same rate (Terabytes written) but the amount of TBW they can - on paper - handle in their lifespan is different for each model so the larger drive will last longer under the same load.

It’s a bit more complicated, when you go into write amplification factor and the fact that manufacturers don’t all use the same methods of testing and reporting, but that’s out of my league. You can look for the articles and video’s from Storage_jm on chiadecentral.

Generally speaking, the larger the drive, the higher the TBW will be, but there is also difference between one model and the next. There are 512 GB ssd’s that have a higher TBW than some other model 2TB drive.
Fortunately, TBW is listed on the spec sheets, so you can easily check to compare.

Also, I would not focus on TBW to much, sustained write speed is imo the most important metric (not listed on spec sheets unfortunately, but listed in reviews like Tomshardware).

Unless you plan on plotting a massive amount of plots, then TWB becomes more important but in that case you might as well look into ramdisk options.