Cicinho-Kjaer-Juan-Angel
Lichtsteiner-Bonucci-Chiellini-De Ceglie
Lichtsteiner is better than Cicinho, I don't see much between Bonucci and Kjaer or between Chiellini and Juan.
I'm not familiar with Angel.
Anyway, I don't see either defence being much good, but I wouldn't say Roma's is stronger.
I heard somewhere that the intention was to use Lamela in the midfield.
Can't remember where I read it, though, so may just have been idle speculation.