I run both these tires but both in stock size. However, with the RG I run load C and AT3 I run P-rated. RG pros - the tread pattern looks awesome and so does the sidewall. The ride is quiet and road noise is minimal. Rain performance is much better than the stock Terra Grapplers that come with the TRD Pro. RG cons - when you sit them for a week it always takes about 5-10 min of highway driving for some flat spotting vibration to go away. Snow performance is not great. AT3 pros - these are 3PMSF rated and perform much better in snow. They are also softer but I suspect that's because these are P-rated. The treat pattern looks good and very happy with dry and wet performance. AT3 cons - they don't look as cool as the RG. If I had to pick one tire - the Toyo Open Country AT3 is the better tire.