iLuveketchup

How much time will I save when moving from Toyo RA-1s to Kumho V710s? I know it's probably track dependent, but would it be worth while to move onto V710s? Should I expect time difference in seconds or fractions of a second? My most frequent tracks are NJMP (Thunderbolt / Lightning) and Summit Point (Main / Shenandoah) with 1x VIR / WGI a year.

For example, my fastest time with RA-1s in Summit Point Shenandoah 1:40.5 and NJMP Lightning 1:16.3.