The Grunt Pig family has arrived, so this is a quick update to add some photos. The original post about the Grunt and Oinks Pigs can be found here: Meet the Sylvanian Families: Oinks and Grunt Pig Families.
The Oinks and Grunt families are mostly very similar, with hand shape being one major difference (the Grunts have gripping hands, the Oinks have flat hands).
Both families wear the same outfits, except for the sisters, who have some minor differences.
Here’s a close up of the girls, so you can see the variations. May Grunt (Sylvanian Families, gripping hands) is on the left and Molly Oinks (Calico Critters, flat hands) is on the right. May’s skirt and scarf are darker and Molly’s scarf has more pronounced dots. Both the Grunts and the Oinks families have entries in the Greenbearshire wiki.