1.23 has better online play due to the levels hosted and the people who play in them. I stick with 1.23 because the people I know play it. I'm not as rabidly anti-TSF as I used to be, but I hate lori just as much as I always have, and I also hate making levels which cater to lori and her inability to jump high.

As for bigger tilesets and levels able to be used in TSF, there's no arguement from me about how that is a good feature. I must say that I really have never seen a tileset bigger than 1000 tiles where I would feel like using each one, so I don't care too much about this feature. The bigger levels thing is nice, but I found out that 1.23 can still make levels that size; you just can't save in them. Therefore I see no point in making a TSF level unless it's in a TSF tileset, because a 1.23 level can be played in both.

As for single player, TSF levels have two main advantages which I see: a larger selection of tilesets to chose from and new enemies. Unfortunately the only new enemy that actually has unique stats and isn't just an old one with a face lift is the blue ghost (it follows you when you face away from it and takes 2 hits to kill instead of one). The blue ghost looks like crap though, and it has to be the ugliest enemy in jj2 (probably why it is hidden from the event list). I did not mention the fact that jj2 doesn't crash with big levels because you can just make a 1.23 level and play it in TSF, which I reccomend.