Actually, the citations don't agree on the nature of the similarity. It's not a good practice to single out critics in the lead section either. This proposal has not received any support in the discussion at Deathtrap, so I think until there is a consensus to include it in the lead it is correct to leave it out. I don't see where you are opening a dialogue, actually. You are simply ignoring everyone's objections. I believe I offered the idea of including the material elsewhere in the article instead of cutting it altogether, so perhaps you could take my suggestion.