King Thor had less experience with the Odinforce than his father. But IMO the German pantheon is more powerful than the Mediterranean one, after all the Scandinavian deities are the primary pantheon of the MU and the Greek/Roman ones are not. Just like how in DC the Germanic pantheon is not a big deal compared to the Greek and New Gods. I always thought that Zeus, Hercules, etc were second-stringers in the MU. If Thor has the Odinpower then he will best Zeus even with less experience.