Dewalt may be better than B&D overall. But, Dewalt stopped being a high end tool even before B&D bought them.
The biggest reason to NEVER buy a Dewalt tool is, Black and Decker has for 40 years had a policy of discontinuing ALL service parts, as soon as the given "type" number of a particular model is 10 years out of production. And by "ALL" I mean even a switch, or a set of brushes. Need them, and you can throw the whole expensive tool in the trash, because they are not available. This had actually happened to me twice, before I wised up. This may not matter if you are a professional , and you are using your company to buy new tools every so often. If you are a homeowner, or perhaps even a part time professional, and you are buying for the name, you could be very disappointed if you are buying a Dewalt tool, figuring you won't need to ever buy another one of those.
Milwaukee, in contrast, at about the same time, got me a switch for a 30+ year old tool, no problem. I have not tried to buy any parts lately, and I have heard they have been bought and sold since then. So, who knows. What their current policy is.
But, I think it's very wrong to tell someone to go fish, when all they need is a switch. I don't think keeping basic wear items available for your customers is asking too much. B&D strongly disagrees.