It seems the new Canon EF 35mm f/1.4L II is being compared to the Sigma 35mm f/1.4 Art more often than any other lens, most likely due to the price difference between the two. There are a lot of Canon photographers that wouldn't buy a Sigma lens over a comparable Canon for a host of reasons, we usually hear autofocus, build quality, totaly image quality and support as the main reasons photographers stick with Canon brand lenses.
DC Fever has posted a comparison between the EF 35mm f/1.4L and EF 35mm f/1.4L II to give you a good idea of the differences between the two lenses. You'll immediately see the advantages of the new lens outside of the center of the frame, there's really no comparison. Mix together the weather sealing, latest autofocus technology and the BR lens, the EF 35mm f/1.4L II is definitely a worthwhile upgrade if you're in the market.
- Canon EF 35mm f/1.4L $1099: B&H Photo | Adorama | Amazon
- Canon EF 35mm f/1.4L II $1799: B&H Photo | Adorama | Amazon
You can view the comparison by following the link at the bottom right of this post.