HP Z24i, E241i, Z22i, E221i - differences?

[Wilkie]

What are the differences in the panels of the HP Z24i, E241i, Z22i, and E221i (besides size, resolution)? Different anti-glare coatings? Also, PWM differences? The coating on the Z24i looks great at http://www.overclockers.ru/images/lab/2013/11/25/2/92_kristaleffect_big.jpg (second row, third from left), and I wonder how the others compare. Thanks!

 

[Wilkie]

Spoke with HP chat, monitor specialist. According to him, E241i, Z22i, and E221i all use the same anti-glare coating as HP Z24i. He is "pretty sure" all are also non-PWM, like Z24i, and will try to send confirmation. Will post here, if I receive it.

If anyone has first-hand experience with E241i, Z22i, or E221i, I would appreciate hearing it. Thanks.