These numbers are pointless when you can just feel the energy yourselves. :/
But here you guys go... (Scale of 1-5)
Gohan - 2
Gotenks - 4
Gohan SSj1 - 100
Gotenks SSj1 - 200
Gohan SSj2 - 200
Gotenks SSj2 - 400
Gohan SSj3 - 800
Gotenks SSj3 - 1,600
The fight has Gohan at SSj3 and Gotenks at SSj2.
Overall, Gohan could win.