They are not the same thing

The LOX are signed to Ruff Ryders, yet they have their own label D Block which is in no way attached to Ruff Ryders. Ruff Ryders are under Interscope, and D Block is under Universal. They share no common artists besides The LOX themselves (Jadakiss, Styles P, Sheek Louch) They have their own artists:

Jae Hood...

and they got

Shells
Trav
Straws
who make up Team Arli$$

and they got their own producers and djs

Supa Mario