Actually, Ebola spreads like AIDs spread in Africa. And like AIDs spreads in our inner cities.
I'm not sure I understand what you mean - ebola, like HIV, can be transmitted sexually but it can also be transmitted by many other pathways that don't transmit HIV. On the other hand, you can be infected with HIV asymptomatically for years -- infecting a great many people -- and that's not possible for ebola, which sickens people very quickly (before a person has a chance to infect many people).
TL;DR - HIV is much easier to spread because people with HIV often don't know they're spreading it for years.