I own both the STLE and POTCCE, question is what you want out of it.
A snack? A quick game at fast pace? Then it's ST. If you want a meal, something you can explore for years, then it's POTC.
If you have a collection going (which you do) then it is down to preference, if it would be a one pin collection it would be POTC or bust.
You have 23 games, it is really up to you since looking at your collection I do not see anything that resembles ST, ST may be a breath of fresh air for you and POTC may command too much attention due to depth of code. Or you want to add a masterpiece that is in a league of its own, then it is POTC.