>>304629974
what vrc tends to offer vs some of it's competitors is the sheer customization. some dont let you pick and choose shaders, others want you to create things ingame, etc. vrc has a very specific way of creating content that is basically almost anything goes. 

the only closest thing to it right now is Lavender, but Lavender suffers from the fact that VRC is established and entrenched and nobody ever wants to shift unless they have to. And the way it handles worlds is a bit dubious for people who are used to VRC's method of handling it. (Lavender worlds are serverwide changes, you dont just drop a portal and go somewhere else, you either switch servers, or change the map for the whole server- think Gmod more than vrc) 

tldr the biggest thing vrc has in it's favor is it's established and offers fairly detailed customization of content. it's got momentum on it's side if nothing else.