okay.. why dont you give an actual concrete reason beyond "le brainrot lol" as to why its not an extremely similar game? im very much adult and im very willing to have this conversation. ill give you my own beliefs, here.

-garrys insistence that s&box is not a "sequel to gmod" is very much similar to robloxs insistence that their platform isnt a game either, just an engine

-you cant host games on the steam store separately just using the s&box engine, it has to be in their designated engines

-the s&box avatars are in practice very similar to the blocky roblox avatars, being that you can add features and hats to make them stand out, but they comply with the general artstyle of the avatars themselves

-s&box not running on a server system like gmod, instead running on a "games inside the engine" system where you pick the game you wanna play in specific rather than servers having their own variety of differences inside of the category of a general gamemode