I appreciate your replies, I think my question may not have been completely clear.
Digitaldog, you may have misunderstood my attempt to clarify on what issue I'm having, as you've repeated my explanation back to me. I do understand that these are entirely different scales, I understand that the R0, G0, B255 value in Adobe RGB sits deeper into the colour spectrum than it does with SRGB, which is why Abode images look overly saturated if I 'convert to profile'.
Ed_Ingold, assigning produces the same result, colour values remain the same between colour profiles, so the outputs will look different unless they adjusted from the RAW file.
My question is, whether there is a way to perform, what might be described as a fixed point conversion, as if SRGB were simply an overlay over the coordinates within Adobe RGB? Basically, I 'd like to save time by not having to do all my adjustments multiple times for different colour spaces, and I don't know if that's even possible.