As promised, I ran a series of tests today.
TEST 1: Dell U2711 in well lit office:
The test instructions said to test in a darkened room. Unfortunately, my monitor is in a fully lighted office environment, and turning off the lights is not an option. I received the same results when using my Lenovo X201 and my MacBook Air. The following numbers represent the specific square number in the test.
- 1-2 Not visible
- 3 Maybe visible (but not obvious)
- 4 Faint
- 5+ Clearly visible
Test 2: Apple Thunderbolt display in a very highly lit room
Because I could not dim the office in test 1, I decided to test the ATD in my home office which had a window directly behind the monitor. It was a very bright day, so the environment was actually quite a bit brighter than my office environment in test 1.
- 1-10 Not Visible
- 11 Maybe visible (but not obvious)
- 12 Faint
- 13+ Clearly Visible
Test 3: Apple Thunderbolt display in a darkened room
This matches the environment specified in the test
- 1 Not Visible
- 2 Maybe visible (but not obvious)
- 3 Faint
- 4+ Clearly Visible
My conclusion is that the ambient light in the test environment makes a big difference. I really cannot duplicate the environment exactly... but I hope these test help you make your decision.
/Jim
Thank you MUCH for taking the time to do this!
I tend to work in darker rooms and glare isn't a deal-breaker.
The Dell has a heavy AG coating, which makes everything look grainy and not in a good way. I'd rather try the gloss.
My current monitors will differentiate 3 and above. 1 and 2 are virtually black and indiscernible and I have to gawk at the screen for a long time. I had read the Dell has problems with dark grays, so reading a condition where you saw the Apple had an edge is (to me) a good sign.
And I don't do anything with print anymore, where "wide gamut" and 10-bit processing would come in handy. But I know either 27" monitor will handle more of the Adobe RGB spectrum than my 23"ers...
With extra calibration (I bought a Huey Pro at the Apple Store a couple years ago), with profiles for morning/afternoon/evening conditions, those problem darker values you'd pointed out might be able to be coaxed out. (Dell calibrates their monitors at the factory as well...)
If I could choose, it'd be an Apple display with CCFL for the slightly better color range, but comparing the two the AG on the Dell is easily a deal-breaker compared to any nitpicks for the Apple.
Apple's return policy is a fair bit nicer than Microcenter's to be sure, in case I return it and go for a high-end 24"... but one can't have everything and I really don't like having multiple monitors hooked up at the same time...