I don't really know, I find the first one a tiny bit grainy, color wise I find them very good (I love how film renders color)
maybe te following photo is a better exemple :
In this one I find the skintone to not be very uniform but appart from that the colors are nice.
at the moment I'm discovering everything and trying to find a good lab too, maybe I'm dissapointed when the lab tell me those scan are good for 8"x10" print with scans that make 1200x1800pxl ;-)
Tanks for you replies.