I just read the topic title and was like "wow, does this REALLY need a tutorial? I mean, it's so.. linear. o.o"
Not to all those wondering: Both of the GTAs WILL lag when you compress them to CSO.
And as OtakuGamerZ says: Tales of the World: RM will not run AT ALL when compressed.
@rpspartin:
The loss of size is different for every game. If two games were the same size, odds are that one would still end up being smaller than the other because of the unique files that each ISO/CSO contains. I know that Final Fantasy VII: CC doesn't get THAT much smaller, but it still helps considering how theirs very little, if any, lag at all.
@Skyline969:
Some games just don't handle well compressed like the ones mentioned above.
You can try compressing the ISO again with a lower compression level, but if it still skips a bit, than you're better leaving it off as an uncompressed ISO.
I highly doubt you got a bad rip as the majority of rips that I obtain tend to work fine. But if you believe you did, you can try downloading it again, and try compressing it at different levels.
If anyone has any other questions, I suppose this is a good place. xD