Tundra TRD Offroad/Pro compared to aftermarket (moved)

I have been considering upgrading my stock 2021 Tundra to something similar or close to the offroad or pro suspension.

The problem is when I am looking around I see MRR, I see IMS. I am a bit confused about what the differences between these are? I think going to go with Dobison however even their site asks for details on springs, shocks etc. that I am unsure about.

I thought there was a list/guide here that shows what the Off Road and Pro use, what the specs of each are. I cannot seem to find it.

My truck rides pretty sad compared to my wife's TRD Offroad and it made me realize how unhappy with my stock suspension I am.

Any links? Guidance? Perhaps I am just not searching with the right keywords?

 

This explains the differences in the 3 shock types Dobinsons make.

https://exitoffroad.com/different-shock-types/

And these pages break down the options very clearly:
https://exitoffroad.com/product/dob...spension-kit-for-2007-2021-double-cab-4x4-v8/
https://exitoffroad.com/product/dobinsons-tundra-2-0″-3-0″-mra-suspension-kit-for-2007-2021-4x4-v8/

 

Thank you, I will read over the pages. Truly appreciate it.