read reviews from people who actually bought them and see what they said.
newegg, other online retails are a good place to look.
both monitors are low response TN panel type monitors. TN panels are cheaper but also have a rather horrible viewing angle. if you're off center by just a tad TN panels often grey-out or invert what is displayed.
you might want to go with an e-ips or va panel instead. e-ips panels will offer you a very wide viewing angle without distortion.
other brands to check out are acer, viewsonic, dell.