Below Is an Argument from Analogy in Standard Form

Below is an Argument from Analogy in standard form. In 2 to 4 short paragraphs, do the following:
-First [1 point], suggest what you think is the best candidate for a genuine and morally relevant disanalogy between the cases being compared. "Premise 2 is false because…"
-Second [1 point], test your suggested disanalogy for moral relevance. Be sure to describe your relevance test and explain what it shows.
The argument:
[note: commercial surrogacy is when a person carries a baby to term for someone else who can't do it themselves. Usually, a sperm and egg are joined in a lab and then implanted in the surrogate by in vitro fertilization -- so, no sex happens to make the baby.]
1) Prostitution shouldn't be legalized
2) Commercial surrogacy is relevantly similar to prostitution. So, commercial surrogacy shouldn't be legalized.