We Americans would further split our IPAs into (generally) East Coast and West Coast.
East Coast would have a stronger malt backbone, and be more likely to use more earthy, often English hops. West Coast stick to the C-hops, mostly, for big pine and citrus flavour.
For beers you can get in Ireland, drink a Sierra Nevada Torpedo next to a Dogfish Head 60 Minute to see what I mean.