Jordan Matthews was the best slot receiver in football? Are you nuts? Doug Baldwin, Larry Fitzgerald, Julian Edelman, Jarvis Landry, Golden Tate, Mohamed Sanu, Keenan Allen, Randall Cobb? Even in his best year he was maybe on the fringe of the top-10. He put up big numbers in a Chip Kelly offense that was mostly devoid of talent but ran more plays than any other team in history. He's not very physically gifted, but he's physical and wins at the catch point. Still, there was a reason he was available later into free agency.
Britt's best years are well behind him, and his weird year with the Rams came when he was the only warm body available to catch passes. He's a journeyman now, and one whose production and yards per reception has steadily dropped since 2014. He'll be 30 in September, and he's got a reputation as a malcontent. Maybe he'll go back to his old self with a full offseason with Brady, but it's just as likely he's on the waiver wire come opening day.
Neither of these guys are even guaranteed to make the team, let alone play a major role. I'd love to see them do well but I'm not expecting anything.