Welback vs. Sturridge isn't a fair argument. One played as United's starting striker for most parts, while the other was played out of position and wasn't even considered in the last few games.
Sturridge is like the black Robben. Can score some excellent goals, but at the same time be the most frustrating players in the world because they always want the glory for themselves.
However, Sturridge has been in a champions league winning team.
Suppose if adding ex-Rangers players as Major, Bas Dost from Heerenveen to Wolfsburg for £7m can get thrown in. Talented striker, top scorer of the Eredivisie last term.