ashley.. try benchmark as well. the differences i can see, for me anyway are we have 3 products, so want a different company name to show for each, and if they opt out i wanted the option of which list they want to opt out of, even if i send them letter A from list A, but maybe they are also in B and C, they might still want letters from b and c just not A, benchmark and i believe aweber does this. benchmark also allows you to set up a whole load of detailed surveys as well which is cool. mail chimp, if someone opts out of one list the lists are not linked in anyway so then you have to manually check them out of the other lists, and have to assume they want out of all with out giving them the option to chose in and out of what lists.
Using the Personalize dropdown, you can insert custom snippets like your subscribers first name, or sign up date, and AWeber will automatically insert that data specific to each subscriber if we have it. If you collect first name, for example, you can send an email that says Hello Tom, or Hello Mary, or Hello John, depending upon who you’re sending to.