Well technically yes, they're better. Because you're spending more money to get a better product. A revolutionary idea!
I can't see these things being very successful. They're basically just corporate-branded pre-built PCs, like an Alienware for example...
Except they're worse, because most use SteamOS (Linux-based) instead of Windows.
"Never argue with stupid people. They will drag you down to their level and then beat you with experience."
-Samuel Clemens