Arsenal secured their biggest win of the Premier League season in a 6-0 victory away to West Ham, and Paul Merson has made an interesting comparison to Manchester City. The Gunners enjoyed one of their best results of the season as Declan Rice came back to haunt his former club in fantastic fashion, with Leandro Trossard also impressing on the day. And Arsenal icon Merson made an interesting observation after the full-time whistle, with the pundit in awe over his former club’s performance in east London this afternoon. Paul Merson makes Manchester City claim as Arsenal beat West Ham 6-0Speakin…