Featherweight Chan Sung Jung is just the kind of exciting matchup for UFC champ Jose Aldo that Anthony Pettis would have been had a meniscus tear not scrapped his appearance at UFC 163. But Jung and Pettis are far apart in the way they dole out violence in the cage, and that’s why Aldo is such a heavy favorite leading into Saturday’s event, which takes place at HSBC Arena in Rio de Janeiro. Aldo (22-1 MMA, 4-0 UFC) is as big as an 8-1 favorite heading into his fight with Jung (13-3 MMA, 3-0 UFC), which headlines the pay-per-view card following prelims on FX and Facebook. When the champ was scheduled to fight Pettis, he wasn’t even in 2-1 territory. Although it’s not fair to predict a fight entirely based on the whims of the betting public, the disparity between the first and second lines reflect an easily observable different between Pettis and Jung. And that counts for something. Pettis, a protege of kickboxer-turned-MMA-fighter Duke Roufus, measures out his attacks in a way that’s fitting of a seasoned striker.