Just happened to see this today..... I had semi-major shoulder repair (bone spur, rotator cuff, frayed bicep tendon) in 09, and less severe shoulder repair - other side - in 16. TKR on 9/13 of this year. Looking back, I would say that initially the shoulder surgery causes more pain for about a week or so, but then it does go away faster than what I’m experiencing with the knee right now. Exactly 4 months after right shoulder surgery I was back on the tennis court, playing (gentle) matches, with overheads and serves. No way I’ll be back for tennis until the 6 months mark, or later. The “good” thing about shoulder surgery is that after you’re done with the painful rehab exercises, it can rest. Knee will keep being used all day long. Also, general consensus seems to be you need to sleep in a recliner. Nope. Just have PLENTY of pillows of all sizes and build a nest to cradle your shoulder. Both times I slept in my bed from the very first night. You can slide tops on under (not over) the sling/brace, just make sure sleeves are wide, and you support arm in lap while doing so. 2nd time around, I put on bra without help 3rd day after surgery, put on (and tied) walking shoes on day 8 and went for a slow 2 mile walk. And yes, even though shoulder has nothing to do with stride, it still ouches when walking.
Sorry to run on, but given the choice, I’d rather have had another shoulder surgery than the TKR - and I’m supposedly doing super well.