- Contrast Ratio*
- Brightness
- Warranty
- Customer Reviews
- Another website reviews
- Brand
Between those monitors (w/o reading reviews), I'd go with Samsung on the brand quality of previous models I've used.
* I'm not sure how they're fudging the numbers these days (I haven't looked at LCD's recently), but as you can notice they have 20,000:1 (1000:1). I'm not sure what they're using to calculate these numbers. I know my first LCD was 450:1 and my new one I bought 18 months ago was 1000:1. How the 20000:1 number is achieved, I don't know.