Explorer differences

[CaptainSlow]

Just looking at the two watches below and to my novice eyes I'm unable to see the difference, can anyone advise?

http://www.montredo.com/en/rolex-explorer-i-black-...

http://www.montredo.com/en/rolex-oyster-perpetual-...

[Tonberry]

They're both 214270 39mm Explorer.

Not sure on the reason for price difference.