I've also mentioned in another comment but in the market where I'm located (Eastern Europe) the Google Cloud sales-people are totally absent while MS has been very, very insistent in pushing Azure down people's throats. I think Google was expecting their cloud solution to be similar to how AdWords + Search worked for them, i.e. that they would need close to no sales-people down in the trenches because the product would almost sell by itself based on its technical merits alone, but apparently (as you well mention) the different cloud implementations are not that, well, different between them so it all comes down to which company was first in the market (AWS) and which company has got the best and most aggressive sales-people (MS).