Innova Ultra Smooth Gloss 285GSM is not the same as IFA9. It is a very specific paper, (see Shades of Paper website for good list of Innova paper) Even close sounding Innova Photo Fibaprint Ultra Smooth 280gsm is a quite different material to Ultra Smooth Gloss 285gsm. (what is available in the UK I have no idea, but not so much I would guess)
I suggest going to Innova's website and downloading their free profile for that paper, and trying it on Epson Exhibition Exhibition Fiber (aka 'Traditional Photo Paper'). See what results you get with that, or at least at soft proof with it, and take a look.
Andrew - any comments on these 2 profiles, (Epson and Innova's) being as we know what we know
I find them both very, very good.