4s & 9xl or 5s & 10xl ?????

[rootar]

In a truggy what will give me better runtimes and performance if both the batteries are the same capacity and the only difference between the two is a 100grams of weight? will the extra weight and 5s warrant longer runtimes and better performance on the 10xl over the 9xl and 4s? and if both were the exact same price which would you run? this will be raced on a track 95% of the time.