I know Site5 has the $5 promo and with 55 domain pointers while HG has the Baby package with unlimited domain handling. Been reading the forums and reviews recently and have not encountered these two companies being compared. Now my question is, I want a host that can support multiple domains and will cost me less than $10 a month. I see both of them being competitive when it comes to features, but I may be missing something or need to hear feedbacks. If you have anything, let me know.
My only warning with Site5 is don't host anything other than static sites there, the may say "unlimited" but put a couple of WP blogs on there with relatively low traffic and watch them flip out. If you're looking for cheap multiple domain hosting I'd personally recommend Dreamhost, much more understanding when it comes to server loads and much better to deal with then the horrid people from Site5 (and I say that from experience).