I have no idea if they are the same at each resort. The comfort of the ones at OKW varies, depending on how much it has been used, and the condition of the individual mattress. I've had some be very comfortable, others...not so much.
I’ve slept in the ones at BLT and at Kidani Village. Didn’t notice much of a difference between the two and they were comfortable for me. I’m 5’9” but if I was taller than 6’ I’d imagine the sleeper chairs may be less comfortable.