Doses probably would, yes. I'm very excited to try it myself. Vettester was the one that alerted me to it's superiority. And yes, B12 is like Vitamin C with excess. Whatever doesn't bind is excreted. SubQ injections are fine, just takes longer to absorb. I do IM because I mix it with my gear.
Here's a link vettester shared that I think you'll find to be a great read:
Cyanocobalamin Versus Methylcobalamin