I'd say that there isn't much point in choosing another film in the hope of getting sharper prints. Grain is tricky to evaluate even under a microscope as it is so dependent on exposure and perhaps even colour. So I guess my conclusion is that the new Reala is roughly equal to Ektar 25 in terms of grain. My gut-feeling is that grain will still come out as 'comparable' however. I guess I shouldn't complain given its' 2 f-stop sensitivity advantage.
Colour rendition responds nicely to polarizers.
Mixed lighting claims borne out, with all the usual caveats. Sharpness and grain roughly as good as it gets at this point in time. Definitely worth shooting a test roll to judge for yourself.