Hi, had this monitor for a few months, its got 1 dead pixel, and a white mark that looks like its on the white part of the panal.

Dell are sending me a refurb, will this be older than the model I have?

Will it of been used for longer?

Do I still have the 2.5 years of warranty left when I take the refurb?

Can I keep my original monitor if the refurb is worse?