To explain...I use the joystick, the three programmable buttons, and the touch strip a lot. My left hand "knows" where they are on the 61, and I have to look and reach a little farther on the 76. I can play either, but I prefer the 61. As far as making the chords, it doesn't matter. In fact the 76 offers more options. I don't have to change the split point when I play "Color My World".
Also, I have a fairly small bandstand and the wider stand I have to use with the 76 crowds things a little more. And, although the weight of the 76 is supposedly only five pounds more, it sure seems a lot heavier to this old man. Not a huge factor because someone loads and unloads it for me most of the time, and I don't move it much anyway. Still, it's a factor.