Mason-Clark relies on strength rather than being fleet of foot (like Tats). He is harder to knock off the ball, but won't often outpace his opponent. Different types of player. I like them both, but at the moment do think his place is more under threat from Rudoni's return. Whilst we're analysing players, I think Haji Wright needs to come back to the party, otherwise I'll be wanting Simms physical presence back (particularly away from home).
I think it is great having different types of players in this position. Although they are very much suited to the side of the pitch they play on, I think because of their different styles it would worth them switching flanks on occasions in games.