Not compared to the 3T Prima 199 alu ones on my roadie (I’ll let you work out for yourself how much they weigh – can’t be bothered digging out my build spreadsheet to check exact weight, but I know they were very close to claimed). If it’s comfort and flex you’re after then doubtless those are more flexy than a carbon bar, which might be an issue for some, though I certainly don’t find it a problem – the only real advantage of carbon roadie bars is actually stiffness.
I should point out that I’m a carbon whore, with a lot of other carbon bits on all my bikes (I’ve had carbon framed roadies since ’97) so it’s not some anti-carbon thing, just that they don’t really make VFM sense (I have to admit I also have KCNC alu bars on my MTB having spent too much replacing broken carbon ones).