Ladies and gentlemen... a main page "journalist."
It all comes down to size, and that Cena's basic move set is a LOT more basic. If all you did was sell for 90% of a match, hit a shoulder block, duck a clothesline, do a spin-out slam, and execute your special moves...you'd probably it down too! I'm a Cena fan (most of the time), but I won't really give him a lot of credit for the difficulty level of his basic arsenal of moves.
CM Punk is smaller, and has a harder basic move set to execute. His finisher alone is meant for smaller guys, and looks ridiculous when he tries to hit it on about bigger than say...John Cena. Even Rey Mysterio, who is incredibly solid in the ring, doesn't look as polished when he's got to face giants in the ring. And part of it is a show; you should make it look like your moves aren't as effective, and that you're struggling against a guy 3x your body weight. The other part is just logistics... There's a reason that Punk's competitors thus far in his title reign have been Alberto del Rio, John Cena, the Miz, Dolph Ziggler, Chris Jericho and Daniel Bryan. They haven't even done a straight Kane/Punk feud yet, because they know how it's going to look. Punk is fantastic against guys his size, and he's still entertaining against the giants. I loved his Big Show feud way back when on Smackdown.
Ladies and gentlemen, a front page writer. Glad we put this guy that clearly understands wrestling better than the rest of us in a place where most people can read his stuff.
Cena's moveset is more basic? What does Punk really do that Cena can't/hasn't done? The kicks? Fair, but that's not where Punk looks sloppy. The elbow drop? Cena does a much more difficult top rope leg drop that looks great every time while Punk's elbow drop looks like garbage half the time he jumps from the top rope. The swinging neckbreaker? Cena's done neckbreakers before that look just as crisp as Punk's.
The depth of their move sets and/or alleged complexity has NOTHING to do with who looks better in the ring.
Size has more to do with the issue, but lots of little guys are incredibly crisp workers. There's a few guys some of you guys may or may not have heard of that were always some of the smaller guys on the roster but wrestled extremely crisp matches and executed some fairly complex moves perfectly. Their names are Bret Hart, Shawn Michaels, and Chris Benoit. For a more modern examples, see Daniel Bryan.
So sorry Mr. Journalist, but almost nothing you said is valid. But here's the good news: the real reason for why Cena looks better in the ring is right in front of you, right on your TV screen.
Cena is more athletic. Punk is not a natural athlete, Cena is. Punk is skinny compared to most wrestlers, and he's not cut either. He doesn't have the endurance that a natural athlete has, and it shows in his matches. Cena, on the other hand, is one of the best athletes in the WWE. He's strong, he has great endurance, and he's resilient.
It's as simple as that, Punk
might have a creative edge on Cena, and he can put on a hell of a show. But when it comes to execution, the odds go to the athlete. Cena's an athlete, Punk is not.