The U2412M is utilizing an e-IPS panel instead of a H-IPS panel that the U2410 has.

A H-IPS is a premium IPS panel and it's used in monitors that are meant for professional photography editing and similar stuff that require accurate colors. An e-IPS panel isn't exactly as good as the higher-end IPS panels but it works fine for most users.

You can find out by heading to the monitor's web page, adding it to your cart and then entering the coupon code when you select check out. If it works you should see a reduction in price, with calculations shown to you.

Link.

The discount code can be found above the picture of the U2412M.