I agree, their "greatest hits" is even called Ear Bleeding Country (?…). Try the solo on Mountain Jam about 20 minutes in. Any solo on Stormy Monday too, they both have that "fat" sound J has. And you’re right, Duane’s known primaraly as a slide player but, J’s sound and style always seemed quite suited for slide to me, I dont recall ever hearing him play with one though….
Dead ringer may be overdoing it a bit but, the similarities are uncanny. I’d like to ask J if Duane influenced him at all, maybe just coincidence.