Consider checking out Nardis indoor shooting range here in SA. They have like 30-40 pistols on hand that they allow for rental, and although it's been quite a while since I last went, I believe they have one of each gun that you're looking at buying (I'm almost positive they had at least one, possibly several variants of the Shield).
I'd call to double-check and make sure before you go. Also, unless you're tagging along with someone who is already a member there, the entry fee for a non-member like $25 plus rental and ammo (for rental guns) fees. But, it would go a long way to letting you compare which you like more.
As for the holster, although I've never bought from him personally there's a guy that has his own leather making business here on this forum -- Lone Rider Leather.