Sorry, but there are very big differences in a number of areas with the 20D over the 10D - as I have my 10D right next to my 20D:
White balance is nailed on the 20D and flat/blue on the 10D.
exposure is much better on the 20D - blown highlights are much better controlled.
Shutter speeds are greatly improved
iso noise is stunning. I can get much faster shutter speeds with a lot less noise than before.
Speed of use is not related to image quality. But being on in less than .4 of a second and taking 12 photos and immediately being able to scan thru them without having to wait is actually a VERY big thing once you've used it. Makes the 10D feel like it's struggling in comparison.
Last but not least, you can now hit the "Info" button after displaying the image and toggle between Display WITH shutter/Ap. setting displayed on the screen, Image with histogram AND AND AND Display WITH NO VALUE SETTINGS AT ALL. This is wonderful since I always hated having to see images with the numbers over the top of the image.
A number of fellow LACDG members (non-official camera club for Los Angeles) told me that of all the upgrades, the 10D to 20D update was the biggest in regards to image quality and ease of use. I have to agree with them.
I was not going to upgrade, but I purchased 3 lenses (triple rebates, baby!):
50mm f1.4
17-40 f4L
70-200 f4L
And with the higer iso with lower noise, I can use these f4 lenses in places I could not before to get great shots.
LASTLY - at 8.3 megapixel, I can take shots with the 70-200 f4 with a teleconverter and crop them and still have much better resolution photos than with the 10D so the need for a larger 100-400mm lens might not be needed.
The 10D is a great camera and I agree 100% that is FEELS better in your hands becuase of the ergonomic layout, but man - you have to not be in denial that there are SERIOUS upgrades under the hood of the 20D that make it a very very worthwhile upgrade.
Gotta get back to work,
John Lehmkuhl
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Los Angeles Canon digital SLR Group -
http://groups.yahoo.com/group/lacdg/
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