Why would you use either when there is OpenBSD w/ carp + HAProxy? There's lots of options out there. I mean, even IIS can do RP work. Ultimately, I would pref

Why would you use either when there is OpenBSD w/ carp + HAProxy? There's lots of options out there. I mean, even IIS can do RP work. Ultimately, I would prefer a PaaS solution over having to run a couple of servers.