meh, i dunno. being a god who is thousands of years old doesn't really mean too much. i'm sure thor IS a good melee fighter, but it really is very rarely demonstrated. afaik we haven't even ever really seen him training as a warrior growing up. if he did, it was....thousands of years ago. he's immortal, one of the strongest beings on the universe paired with one of the most powerful weapons in the universe. WHY does he need to work on his melee skills? sure he'd pick stuff up, but it doesn't necessarily follow that he would automatically be better than ben, who is NOT as strong, is NOT invulnerable and HAS no weapon to fall back on.
the best skill feat from either imo is the thing vs champion feat. champ was BILLIONS of years old, dedicated to PURELY melee combat and ben was able to actually fight him h2h and hurt him. repeatedly. that says quite a bit to me.
we know herc was a famous wrestler--hell he may have invented the sport, but he's certainly not daredevil and if strength and durability were equalized matt would f*** up herc's shit in a hurry, like he would thor's.
neither age nor status (as god of war) =/= skill
i think it's certainly a debatable topic at the least and with all things being equal, if they had to battle h2h i'd take ben more often than not. /shrug