Different brands cannot really be compared just on duro / hardness alone, as they feel so different to me.
Bones bushings - 3 Hardnesses: Soft Bushing: 81A, Medium Bushing: 91A, Hard Bushing: 96A
Indy current colours, white very soft 78, red soft 88, orange medium 90, blue medium hard 92, black hard 94 and yellow very hard 96
Thunder aftermarket has the rebuild kits soft red 90, meduim blue 95 and hard black 100, then just the container tube from the current thundertrucks.com showing clear yellow and white both 90, clear blue 94, clear red 97 and neon yellow 100
Also Thunder has different heights of truck depending on size, so for mine in 149, or from 148 up the Indy bushings will fit fine as the Thunder trucks are taller, but the smaller sizes are lower, so will not fit as well.
Stock bushings are said to be around 90 duro but feel way different to the aftermarket bushings of the same number and the different brands have different amounts of squash and rebound too, as well as a significant difference when new to when worn in.
Before you put different bushings in your trucks compare sizes and heights of the bushings, especially the bottom bushing as difference in height will most definitely affect how the truck performs.