Better all round player based on what? His hold up play isn't better, he isn't as good a finisher, they both work hard and Tosun is more physical. That said, they shouldn't really be compared because DCL is 5-6 years younger but it's fair to say he's not a better all round player.
Like I say, it’s my opinion based on what I’ve seen from the two. More flexible tactically and seems able to stretch the game, while Tosun looks to me like a penalty box striker who admittedly seems to have an absolutely galactic finish.
I’ve also said elsewhere I don’t think there’s a great deal in it either way.
However I’ve just had a look at squawka (not the best I know) per 90 stats for some key stuff and Tosun looks ahead for most things to be fair.
That said, I also know that footballfactman on twitter has a model that says DCL > Tosun other than goals.
So, yeah - not sure. Personally I would start Tosun because £ and because he’s a bagger and because like I say - wouldn’t wanna judge anyone off half an allardyce season, let alone a striker.