I'm pretty sure those are American Racing Outlaw IIs, I've got a set just like them in the 8". Correct me if I'm wrong but 10" are better handling and a wider "look" while 8" are desireable for off-roading as they are set "in" (more than 10s) and are therefore a little more "protected" from scrapes, etc. and 8's are generally better for low-pressure applications, like on sand dunes.