I have railed against ERod, but there is zero doubt in my mind he is a better starter than Pom, who simply does not have enough variety in the pitches he throws, which is exacerbated by the slow fastball. ERod has heat, a good changeup, a good slider, and a decent cut fastball. His issue is command.
I have also railed against Porcello, but at least see he mixes up five pitchers pretty evenly--4 seamer, 2 seamer, changeup, slider, and curve. When he has command, he's pretty good.