Maybe it's a regional thing, but Brickman does absolute crap work here. They're always the cheapest and their sites look like HELL.
Valley Crest on the other hand is a boutique firm who gets a large percentage of the high end, high dollar commercial work. Their offices are chocked full of people with horticulture degrees, pesticide and irrigation licenses.
They don't have 2billion in revenue because they suck at what they do...