What now? What if partner had bid 3♥ directly over 2N?
Any good agreements to have over a jump shift at the 2-level? (we play that even though the auction is GF, 2N still indicates a bad hand, and 2N-then-3N shows doubt about strain)...
Edit: to all who bid 3N (in either auction): partner now bids 4♣.
... whereas a direct 3N is a strong suggestion to play there. Do you comply with partner's decision? (and do you agree with 2♠?)
Do you agree with the pass over 1N? With the pass over 2♥? Do you pass again?
At that point you believe that IMP-difference is actually going to come into play. If you choose to bid 4♣, please specify your actions over partner's likely rebids.