Along the same lines, a 6.0 that made it to 180k is either solid or bulletproofed. May be the better truck in this case but at those miles and age, there’s more to it than miles and purchase price.
For those saying they’d wouldn’t buy something that high of Miles , I’m guessing the OP wouldn’t either if it was in the budget. Not everyone can afford a new car....
That said, even if the 6.0 is soiid, they are generally more needy and finicky than other diesels and certainly more than any gasser. Not the best for the casual user, more of an “enthusiast” truck. It will outpull the Hemi by a good margin though.