The difference is, Bostock is 16, O'hara is 21. There is a hell of alot of development between 16 to 21, so really Ramos bringing O'hara into the team is very different to giving Bostock a go.
I wonder whether the emergence of man cities dirahams was what stopped our striker being signed, DL comments suggested that we thought we had it tied up until agents scuppered it.. I.e did an agent tell huntelaar to hold fire untilk Jan as Man City would double his wages !!