Apples to apples, there will be a small difference only. Basically 1000lbs more. The real question is what is "ok" to you? You're obviously ok with going slow and going even slower up hills. Call it 20% worse for the 20% more weight you're pulling and that will be a good ballpark what to expect.
The one thing you have going for you is trailers pull "easy", comparatively, behind class A's due to drafting the moho.
2016 Ram 2500, MotorOps.ca EFIlive tuned, 5โ turbo back, 6" lift on 37s
2017 Heartland Torque T29 - Sold.
Couple of Arctic Fox TCs - Sold