I've tried both, although the Ergosum although for a very short time. I have small hands and with the ergonomic bars, I simply can't comfortable reach the brake levers when in the drops. With the classic round shape of the Rotundo, not a problem at all.
The 3T Rotundo Team is a very stiff bar too! No flex at all even at full sprint (keep in mind that I'm quite light and not very powerful, but a definative improvement over my old Deda bars)
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