Why should it be memorable at all ? If you can't stay in their mind by having a great solution for a huge pain then it's a lost game anyway. If they love your idea/solution then you won't need to actively use the comparision at all.

The proof that the business model works and/or scales cannot come from a competitor (except 100% was copied from them but then again just cloning is a dumb idea anyway). That proof is the goal of any serious entrepreneur. I don't see a convincing argument towards VCs here.