Which do you like more?
No.1 in Gm, Op.25
No.2 in Dm, Op.40
No.2 is the first ever concerto I learned and performed. It's only now I'm doing No.1. Anyway, I think, technically, the 2nd is harder than the 1st. But, in terms of musicality, the 1st is definitely more musical than the 2nd.