Although I myself don't have the S24 Plus (I have the Ultra), my mother has it since she doesn't like big phones too much. I would say the only two differences between the two are the battery and the display. If you use the S24 Plus in the highest resolution, it will make the screen look better, but it will also drain the battery faster. My mother uses it in 1080p, so it's not a problem and provides a really good backup, almost comparable to my Ultra. Also, the S24 has slower charging, but the S24 Plus has a bigger battery, so the charging time would be similar, if not less, on the S24 Plus. Also, if you get the S24 base, keep in mind that the base 128GB model has UFS 3.1 instead of UFS 4.0 storage. In my opinion, go for the S24 Plus as it has a bigger battery, faster charging, more RAM (12GB vs. 8GB), and a QHD display (though not something you would use all the time, but still, watching content on it feels good). If you are thinking about the S24 base and that too for 50k, I assume you have some offers, cards, or something. If they also apply to the S23 Ultra, that would make more sense than the S24 base, but you do you.(At the end, I corrected my grammar with Galaxy AI. Take that, you grammar freaks!)
