I don't usually care about if a work is overplayed or not. If I'd do, I'd lost the pleasure of playing many beautiful music. I played Op 27 no. 2, I worked Op 26 but never finished/did serious work on it.I think any of both could give benefits to you. Which one choose? It's up to you. Listen to your heart. Choose the one you really want to play... or if you can't decide, play both, why not...
Which did you find more difficult?