I have never been to their classes but from what i gather from other posters and websites;

F5 Ian Lim Vs Andrew Pang

Both specializes and concentrate alot on calculation; less emphasis on theory. Theory part studied independently.

Both are more or less similar.

P3 Parminder vs Philip Woo

Apparently Parminder is somewhat of a deity for this subject. Posters commented that he has good IT knowledge and this paper has IT elements.

Philip Woo specializes more on P1. Alot of IRL examples due to his practical experience. Keeps class lively. But his notes are scrappy.

Another person who is always mentioned for P3 is Michael Mainwairing. It seems that he has a condensed 100 pages notes that can cover the entire syllabus. He teaches less nowadays and only for IRC classes if i'm not mistaken.

Hope this helps.

i attend Ian lim and Andrew pang classes before...
if your basic is good enuf then u can go for Andrew pang because he teaching very fast one...quite alot of my fren also don't understand what he teaching...can't catch up..must study very very hard yourself lorh...i attend his class abt 3 months..after that move to Ian lim.Ian lim teaching style more systematic...not too fast or too slow.As my basic not very OK..after he thought me everything bcome OK if compare with Andrew pang. However,this depends on different ppl~
I know Philip Woo is the best lecturer in this paper...parmindar im not vy sure

hope this helps u