Checking burn rate charts and where they rank... BLc2... 105.BLC-2 (Hodgdon) and Varget 117.Varget (Hodgdon) . So Varget is a bit slower burning....not sure that equates with higher temps. The chart was found on "The Reload Bench."

I should also say that Varget is very popular in .308...and for heavier .223 rounds.