I had allergic reactions to Remicade, so it scares me now, but many people are able to take it fine. My rheumy said her RA patients see more response from Remicade than Humira, but as far as Crohn's goes, I don't know the statistics and everyone is different anyway. Humira is SO much more convenient and is also cheaper for most people, I think. But, yes, they have many more years experience with Remicade and usually try that one first.
Both put/kept the gut aspect of my Crohn's in remission but neither have helped enough with the arthritis. Either one you choose to start with, there is a good chance you will try the other one at some point anyway, so do what your doctor thinks is best and what you are comfortable with, and what you can afford.
Crohn's Disease, Acid Reflux/Gastritis, Hashimoto's Thyroiditis, Endometriosis, Arthritis, Depression/Anxiety. Too many meds to list them all. =)