The Canon lens is an excellent lens. As you point out, it produces excellent images (color, contrast, sharpness, brightness, basically, just about anything you could ask for, tracks fast, light, small, easy to carry and use). What will the Tammy do better?
I love my Canon. I also have the 70-200 2.8 is II and for travel, the f4 is is way easier to manage, especially with multiple bodies and other big L's.
Think hard before you give up this gem of a lens.
I have the opportunity to sell my Canon 70-200 f4 IS L at a fair price. I was thinking about selling it and buy a new Tamron 70-200 f2.8 VC.
I know the Tamron is bigger and quite heavier, but that wouldn't be a problem. My doubts are:
1) Image quality: I don't think the Tamron is as good as the Canon
2) Colors: I don't know about the 70-200, but I have a Tamron 24-70 f2.8 VC and though it's very sharp and has a great stabilizer, it has bland colors. I also have a Canon 16-35 f2.8 L and the colors, compared to the Tamron 24-70, are immensely better, richer, brighter.
Any advice? Thanks!