For future, when comparing A1 with B1, it's nicer if the order is maintained when comparing A2 with B2 (instead of stating that you're comparing B2 with A2, and that A2 is equivalent of A1)

"Comparing Nano to IOTA is like comparing a rock with an atomic bomb."

Combined with your follow up sentence, describing how Nano has one feature, while IOTA has that same one feature, as well as more features, there's no requirement to explicitly state that you view IOTA to be the bomb in this analogy.

I have no view on the substance of what you wrote, just the way it was written, and wanted to help. I hope this helps, and apologise if it doesn't.