Looking at the tread pattern they look to be the same as my Toyo 330s that I run on the back of my bug ( 195/70, bought several years ago), I read that the 330s were intended for pre 1990 cars so maybe the 310 are a revised specification.
As a tyre I think the Toyos are a good quality product and wouldn't hesitate to buy them if they were in a size I wanted. As for road holding I can't really say as having a nose down Cal Looker , I don't drive it hard round corners