Looks to me that much of the difference can be attributed to the higher corner exit speeds with the cups. For example, you're 7 mph up with the cups coming onto the front straight (@ 1:39). At peak speed on the straight, you reach 115 with the cups, and 113 with the ss. So that gap was closed to 2 mph with the ESS kit.
All of that said, I think the best look at your straight line acceleration is on the front straight as you shift into fourth. I honestly was expecting more between 103-113 mph in fourth. Could very well be the hot weather.
Top speed for me on my home track is in the 120-130 range down the back straight. On a 50-60 degree day I can nearly clip 130 mph whereas on a 90 degree day I'm just over 120 mph. Same tires, identical final corner exit speed, same brake point.