The point here is that these are different types of strikers. Austin, Mboyo and Holt are big bustling lads with differing degrees of technical ability in the old Centre Forward mould. They good for playing as lone strikers in a 4231 or as a main striker ina pair. But these strikers are rarely going to score you 20 goals a season.
The second type of striker are what used to be called "Number 10s". They are your goal machines, but they cannot play up front on their own.
Now with the current set of striker rumours, Hooper, Odemwinge, Adam Le Fondre etc fall into that category.
So, in terms of the OP, Austin would be the only option in an either or question because you would not have the likes of Hooper playing on his own up front.