We have a 2021 2500 Tradesman with the Level 2 package and a 2022 3500 Bighorn with front buckets. seats in both trucks feel the same
a tradesman equipped similar to bighorn won't be $6k difference - more like $600 difference
you may be adding a few items to the bighorn that aren't available on the tradesman or you're not adding options to the tradesman for items that are standard on the bighorn (trailer tow mirrors, brake controller, chrome package, 8.4 uconnect and so on.
below are two similar builds...yes the initial difference is about $5k between the two trims, but once you add the options to be similar to a bighorn, price is pretty close (I added some common options that a lot of people add/want)
just noticed that I added an upcharge color on the bighorn so the difference is closer to $500
View attachment 43056
View attachment 43057