The compound and the dose are predictably the same for me, but varied between them. Low dose shrooms: One with nature, universal love, watching everything alive breath. Mid dose shrooms: I become an aztec snake, get geometry, structural universe. High dose shrooms: Past life journeys and childhood memories. Low dose acid: lo-fi geometric one love reality. Mid dose: reality is electric, seeing/feeling the "walls of reality". High dose: electric, electric, what is this thing, synthetic geometry is reality? Everything looks like electricity. 2cb low dose: saturation on 3000%, everything is the light it should be and reveals itself as such. mid dose: opposite of ego death maybe? super embodied, no fractal stuff etc, but more looks like a "rubber" reality. High dose: for me not visual or auditory, very physical almost... physical hallucinations? Melting into things, becoming them etc.
The list goes on, but it's interesting how different yet the same they all kinda feel... guess that tracks given what are actually limited variables.
I've not had that experience with Salvia but I've read about what I presume you're talking about and I don't believe they are the same. 2cb feels like boundary dissolution, I'm still very much me but my edges have melted into the...couch, pillow, sheet. I think become them is way too strong of a term when compared to Salvia, I think Salvia is more towards ego replacement but 2cb is more somatic boundary changes. The 2cb effect is extremely pleasant.
The list goes on, but it's interesting how different yet the same they all kinda feel... guess that tracks given what are actually limited variables.