Master Crimzon
Baby Killer
Well... I personally must say that it's rather difficult to compare both trilogies- that being said, however, both have their pros and cons, and there are certain, very similar parts about them. For example:
Each trilogy has one rather weak episode filled with kiddy humor. RotJ and TPM, in this case.
Each trilogy has more of a fun, lightweight episode. ANH/AotC seems like the correct comparison.
Each trilogy has a dark, complex episode generally considered to be the best of it. ESB/RotS, obviously.
However, they were done in very different manners, which accounts to why the the OT is so much more popular than the PT. The OT is done with very simple, black-and white morality focusing on a relatively straightforward story. That's not 'bad', it was certainly Lucas' intention, but it also makes the film feel easier to enjoy and to connect to. However, the PT, despite often being bashed for being too 'kid friendly', and filled with 'cute moments', has an ultimately darker, more complex storyline that climaxes in RotS; the morality is no longer black-and-white, the villains often more misguided idealists than just 'evil' people... and, of course, politics. It depends what you prefer, really, but both trilogies have their ups and downs.
I gotta say, though, RotS is my favorite Star Wars movie; maybe it's because I'm just a teenager and therefore do not have the OT nostalgia factor. However, ESB and ANH are both next in my list. AotC is very good, too... I dunno, It's pretty close to ANH, IMO. Oh, and then there's TPM and RotJ. And, believe it or not, I'd rather have Jar-Jar then Ewoks.
As for the pure saber duels? I'd guess the PT has superior ones. I mean, the duel between Yoda and Dooku, say, is unbelievable; the later duels, such as Obi vs. Ani and Sidious vs. Yoda are high-staked, with the former being the most emotional Star Wars duel, filled with badass music. I don't remeber ever watching quite a thrilling sword duel in my entire life.