Does Reed really know more about Pym Particles than Hank Pym?

He claimed so but Hank obviously disagreed.

I don't think saying, "It's on, b####" is a disagreement. Pym's own team was laughing and spitting their drinks at Reed's nonchalant statement. It's also written by a writer that bona fide loves Pym and had Hank outsmart Reed later during that storyline, so Reed's arrogance, justified as it may be, got a comeuppance.

If you're asking if there are actual feats suggesting Reed knows more on the subject than Hank, that's doubtful. But still, it's Reed Richards, he has literally recreated the entire universe - so it's possible.

Reed’s an asshat

Im not sure if he does right now, but I'm certain if he really wanted to he'd easily be able to know more about them

Reed is overall a more intelligent person, so the potential is there

Source for this?

Reed is notoriously arrogant, so I’m not sure if I’d trust him on this one

It's Dan Slott's Mighty Avengers. #25.

@ready_4_madness: you're right

He does