My experience with 2004 Record 3x10 on a Merckx Majestic, and 2003 DA 2x9 on a Dean Castanza. Record RD upshifing is somewhat mushier than DA RD upshift. The CF lever/cable routing on the Record just isn't as drag-free as DA for RD upshifts, and the Record upshift lever is smaller. For downshifting, both RD and FD, the Record is more precise and much faster. Punching a thumb button on the Record vs. a finger lever on the DA. This has a disadvantage on the drops, however, where the DA downshift is still accessible, and the Record isn't. However, I don't shift from the drops much.
I concede that this compares a triple FD (Record) and a double FD (DA). The DA FD has one intermediate step between chain rings, whereas the Record FD has 4 (!!!) intermediate steps. A triple needs FD tuning, so if you like triples, I would definitely go Campy (in addition to the extra cog with Campy).
If you are picking between double chainring gruppos ....
I concede that this compares a triple FD (Record) and a double FD (DA). The DA FD has one intermediate step between chain rings, whereas the Record FD has 4 (!!!) intermediate steps. A triple needs FD tuning, so if you like triples, I would definitely go Campy (in addition to the extra cog with Campy).
If you are picking between double chainring gruppos ....