1) For me, the web services aspect is what differentiates this from the duplicate. Yes, services are just classes or methods off of classes, but the manner in which they're interacted with is different. So I see them as related, but different questions.
2) This one is really unit vs. integration testing whereas the dup is "what sorts of testing are there?" And that doesn't go into the level of detail the unit vs. int question could have generated.
3) Another related, but different set here. The question I linked is really focusing on when to use. The duplicate question (to design...) is…