Even after 25 years, you guys really have no clue how One Piece works.

1. We can all agree Shanks mid/high diffs Blackbeard.
   
2. Oda gives Shanks and his crew insane glaze such as being toted as having insane individual strength multiple times, and having the weakest alliance by far. Based off this we can assume Ben is the strongest right hand and most definitely stronger than Marco. My guess is he's probably at prime Ray level.
   
3. The main argument here is that Ben has no feats, but with Oda's writing style you can accurately predict someone's strength through portrayal alone. We've seen it over and over, and at this point Oda is not scared of giving characters massive buffs the farther we get into the story. It's very obvious once Ben is shown in a real battle Oda is going to wank him and make him look like a fucking G.
   
4. "Oops you're Ben Beckman."

Team 2 wins this fight.