It got my tyre size right and even a list of sizes for optional wheels. It didn't list the Goodyear F1 for me either, but the Primacy HP I paid £125 a tyre for were listed at £111 fitted.
The situation you mention is going to be no different than with mytyres, blackcircles or etyres.
I haven't checked out the event tyre prices yet, but will be sure to.