We're going to be ordering a 2021 Sierra HD 6.6 gas soon, we have it all spec'd out but the only question left is 2500 or 3500. I understand they're identical except for the rear springs. We'll likely be upgrading the TT in a couple of years and while I don't see us ever getting a monster and I prefer TT vs 5er the cost difference to go to a 3500 is minimal. This truck will be used as a DD quite a bit so my question is for anyone with a 2020 or 21 Silverado or Sierra HD truck, did you test drive both and is there a noticeable difference in ride unhitched? Thanks