Ifedi is bigger, longer, and likely just as strong and athletic and possesses quicker feet.
Ifedi is raw with technique flaws but so was Sweezy.
In terms of experience, I put Ifedi heading into year 3 Sweezy. The off-season that Sweezy added about 20 pounds to push his weight in that 315-320 range. Ifedi is already at 325 and is a monster.
If you could find any prospect in this draft that could give you that raw but physically imposing presence to replace Sweezy, it would be a 6'6, 325 pound behemoth with 36 inch arms (Ifedi) and pair that dude with a 6th year, 6'7, 330 pound behemoth with 36 in arms (Webb).