irish oatmeal vs steel cut
"is there a difference between irish oatmeal and irish steel cut oats?"
No. The terms are, for all intents and purposes synonymous. They also go by the names "coarse oats" and (my personal favorite) "pinhead oats".
"it tastes better but im sure the steel cut is better for you?"
Since they are really the same product there is no nutritional difference between them.
Edit: O.K., when you say just "irish oatmeal" do you mean a quick cooking variety of Irish oatmeal? If that is the case then a product identified as Quick Cooking Irish Oatmeal is not steel cut; the groats are steamed and rolled (ala Quaker Oats). This gives the final product a decidely different texture and somewhat different flavor than steel cut. Both forms start with the same whole groat with nothing added or removed; there are essentially no nutritional differences between them.