Walcott is good player, and yes, he hasn't found his form yet, but on his day, definetly better than Nani
Tbh I'd say he has found his form. Start of the season was scoring goals, got an injury, come back socred two against Newcastle and hit the post against West Ham after coming on. Not sure on whether or not you could say on his day hes better then Nani. Well not 'definetly'. Hes only young so lets hope he finds his feet this season and pushs on.