Bottom line, crohn's is more serious because it can affect your entire GI tract ( mouth to anus) and also for part of this reason can be tougher to get under control, UC is limited to the colon/rectom area only, it too has the same extraintestinal manifestations, EXCEPT for fistulas, those are CD related only, obstructions/blockages are more common with CD than with UC, so CD is worse that UC in those regards...
Symptoms wise, you could have a mild crohnie compared to a severe UCer which would make the UCer somewhat worse off, symptom wise.
ediekristan, no need to be offended when someone says "at least it's not crohn's", as you wrote "To be honest, I always got kind of offended when people said "well at least it's not Crohn's" like my disease isn't as bad and I must not be suffering as much. I agree, UC is better in the fact that it CAN be cured by surgery, where crohn's cannot."
We have polyps which can bleed these are basically the same as ulcers and although bleeding is more common with UC compared to CD *unless CD is affecting the colon*, having it throughout your intestinal tract along with the extraintestinal manifestations which are almost identicaly to the ones UCers get, we also can be plagued with fistulas and surgery for a crohnie basically means within a matter of time the disease will affect the area where surgery was done.
They both suck, but clinically CD is worse because of the extra complications and the entire GI tract being at risk.
My bum is broken....there's a big crack down the middle of it! LOL :)