Alternative solution to http://cs.lichess.org/training/40538

The official solution is
1... Ne3 2. b4 Ng4+ 3. Kh1 Nf2+ 4. Kh2 Rg2# 0-1

but I found solution
1... Rg2+ 2. Kh3 Rg4 3. Kh2 Kf2 4. a3 Rh4# 0-1

which is just as good. Am I correct? Because I didn't get any points for that... :-(