EPT/WPT/WSOP - Which is the Toughest to Win?

I havn't played in any of these so I have no clue but just from watching on tv etc and considering nobody has every won 2 ill say EPT

I think it's impossible to say which are tougher, because there's a huge difference between all the WSOP events. The $10k 6max is definitely much tougher than like the EPT in Barcelona, but at the same time some of the $1k NLHE events are easier.
Same for WPT events, the $25k championship is tougher than the $3k events.

I'd go with WSOP because of bigger fields.

I have won every otter than WPT, but it doesn't have any level at all.. So WSOP

As always Barry you have pretty much hit the nail on the head again. The ept is by far the hardest field and you just can't dismiss the satellite qualifiers as weak as quite often you see a lot of the top 50 names on pocket fives amongst those that are stars qualifiers in ept fields. With the present economy less people are just flicking the buy ins to these events and take the bankroll saving measure of qualifying on the cheap.

FullTilt weekly freeroll has the toughest fields imo. If you look carefully, you will notice that nobody has won an EPT,WPT,WSOP and FTP WF title.