It's very project-specific and depends on priorities.
In some cases priority = aligned, comparable presentation (I'd call it "outer context" - especially when you present products in an e-shop, where comparing additional elements, like price, product name etc. is crucial): you should use grid view.
In some cases, though, priority = maximizing visibility of what is on the images (especially in case of Pinterest, where presenting the imagery in full form is crucial, as this is what users come for; let's call it "inner context"): you should go for staggered grid view.
So, you need to answer the question first: Which is more important for user/conversion in case of particular project? If outer context > inner context - you choose standard grid view, otherwise, you should consider staggered grid view.