I own this lens on FF and it is much sharper than the first version. Every single site that has reviewed this lens says it is better. All over the forums, internet, even Canon data (MTF charts etc) says this lens is better.
After reading the review of this lens on this site, I have to call into question the validity of this test. Also after seeing such result that is so out of whack compared to other lens testers, I just have to call into question the validity of the whole DXOMark lens test site.