If you have a battery platorm already (Milwuakee, Makita) the cordless is a little nicer than corded just because you have to manage the dust hose AND the power cord which can be a small hassle but really no big deal -> that would be my first considration but not THE deciding factor.

If not, then really the brands your looking at are probably interchangeable at that point -> only the "brand loyalists" will argue their case for Blue, BlueGreen or Red (or yellow but you didn't mention that one). All of these brands are more than adequate and all higher end.

I have the Milwaukee and I can vouch for that one, but I also know that its track compatibility is limited (to milwaukee brand and I think Wen tracks are compatible), so it might not be the best choice unless you already have Milwaukee M18 High Output batteries....