:X I feel like writing similar stuff in "n"'th topic^_^; but gonna try to put most of it at once, but imho generally none is "better".
The only true reason why people say NTSC are better than PAL is that PAL versions are often just patched or badly ported NTSC versions. Meaning they run slower in "full speed" by those 10fps. - Soo in other words they would be exactly as NTSC ones slowed down a bit. Having such game usually means setting the speed(with turbo) to 120% gives same experience as NTSC, but leaving it at 100% makes the game slower than it originally was - obviously it gives no gain for emulation, but usually(bugs can be different among versions) also isn't worser for emulation.
If the game was rewriten for PAL it often have additional stuff like new items/enemies and such which is always nice. Most PAL games were released a bit later and do have bonuses(althrough NTSC-J sometimes have even bigger bonuses - like FFXII international). Also those games with rewritten engines are ment to work at full speed(same speed as with NTSC) on 50 fps - those are easier to emulate. Unfortunately I dunno about any list of such games.
Also rewritten engine means different glitches/bugs than in NTSC version, not always same fix works for both versions. Good example(unfortunately also only one I'm sure for working better
) is Budokai Tenkaichi 3, in PAL version it had constantly flashing "light" in the background and had it for pretty long time, but when that glitch was fixed in the end it runs faster and requires about 20% slower pc to get to full speed which IS same as full speed of NTSC
NTSC is also often said as better for having "smoother" graphic with that 10fps more, but trully human eye cannot see it anyway soo it's rather psychological aspect of people thinking "more better". But for same thinking people PAL on the other hand have higher Native internal resolution which is always nice, through not really anything better with scalling in pcsx2 either.
In the end unless somebody every bother to do a list there will always be general assumption NTSC>PAL which actually rarely is true in cases where those bad ports get something broken(I think FFX PAL actually is such bad port - for stupid "fat" widescreen mode at least), as most of those PAL games that are only "slowed down" can be run on 60fps with emulator anyway and then it actually have same reqs as NTSC, and among those which are rewritten PAL is often better for emulation speed.
Assuming we have a pc that can run both versions at full speed and the game is playable in similar way(considering glitches in pcsx2) the better will be the one that has additional stuff/bonuses etc. as a bit slower or faster gameplay or internal resolution is easily adjusted in pcsx2 most of the time.
Considering low end pc's through I would say PAL are better and will try to explain why before somebody's cut my head off. Well even when it's just a bad port with changed speed 50fps in such bad port will give same speed as 50fps in NTSC. Soo like half od pal - 25fps would be same slow as 25fps in NTSC nothing really worser here, not counting any limits, which can be passed in pcsx2 anyway fps by fps they're emulated SAME(generally). While IF the game was properly converted or written with PAL in mind 25fps in it would be as 30fps in NTSC leading to 20% faster emulation. Ofc PAL = higher internal res, soo in cases of very weak GPU's in set with nice CPU - NTSC version can actually be slightly faster... but internal res can be set using "custom" to lower than native, meaning it doesn't really matter.
Like in above example - just couse in most cases it would give NO GAIN - doesn't really mean it's worser as people often assume. It would be simply same, no gain but also no loss, and in those more or less few cases which were rewriten PAL would be easier to emulate.
Unfortunately it's still imprefect emulation we're talking about and soo the speed isn't only matter, each and every game needs to be looked at a bit differently, they have different engines, use different effects, the difference between PAL and NTSC isn't really equal same in every title. Some times one version is playable, other crashes at the menu;].
It's also rare to have a possibility to test NTSC and PAL versions on exactly same pc, plus people tend to defend what they paid money for, and will most of the time say the version they bought is better, even if it means lying to prove it. Soo any kind of list pointing exact difference in different titles even if just based on emulation speed would be potentially very hard to do and the usefullness of such would be minimal only for people that plan to buy a game as it's hard to imagine somebody's wasting money on different game version just to gain a few fps more;P.