Either you're kidding or have no idea. You can't compare Zac and Alex Federov. Federov was just a big guy with very poor shape. I'd say Federov ranks even less than the structurally challenged Art Atwood.
Zac can go all the way to the top in a couple of years. Only reason he never won his pro card earlier was because he couldn't nail his conditioning. He never had a problem with size or shape.
You need to post pics and see. All Alex had was a slight asymmetrical back detail on one side and a pec tear... He was the shit other than that. Artwood was a mess, wide waist, small arms, very fucked up abs, huge legs, big chest, he was the American version of Paco.
And at least he step on stage with Ronnie Coleman no less.
Stop building Zach up, and then ya'll will tear him down when he falls. He looks good, but he looks like the Paki version Jean Pierre Fux...and we remember how he turn out...and bet you don't know what hPpen to his legs neither