The main reason people are more bullish on Universal is because of their recent track record. What has Disney done recently? Between 2005 and 2015, a ten year period, what did Disney build? New Fantasyland, Monsters Inc Laugh Floor, new Star Tours and American Idol, that's about it. So six new attractions, one new land, and a redo. And what did they shut down? All of Pleasure Island, half of Hollywood Studios, and let maintenance slip all over the place.
In a *six* year period, between 2008 and 2014, Universal has built two full amazing highest quality Harry Potter lands, two extra E-ticket rides, rethemed a ride *and* a full land into The Simpsons and built two top quality hotels.
Disney have done nothing in recent years to give cause to give them the benefit of the doubt, nothing to show they can still deliver the goods, whereas Universal have exceeded expectations at every opportunity.