Cohen was part of the Glovers side that defeated Nottingham Forest in the play-offs last season before his summer move to the City Ground.
"The squad is definitely stronger than last year," he said of his former club ahead of Saturday's game between the two sides.
"They have got young players from Liverpool (Lee Peltier) and Manchester United (Ritchie Jones) and they have got a lot of experience in Marc Bircham, Paul Warne and Lloyd Owusu.
"I know they will be there or thereabouts at the end of the season."