The colours wash out pretty distinctively on the TN consoles. Text should be unreadable on the bottom console. 7010 and 7011 have confirmed dual IPS. 7012 has dual IPS, top IPS only, bottom IPS only and dual TN. Everything 7012+ is dual TN.
Serial on the box or under the top faceplate.
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It may be that specific batch of 7011s. I have 2 of them, and they don't seem to have that issue at all.
Can confirm. I just picked up a YW7011 edition as well and it has dual IPS displays.
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Just curious, is the bottom screen supposed to look slightly fuzzy or not as sharp as the top screen?