I just got the normal Lycosa InfernoUK, not really keen on it, dandruff and food bits show up lovely on the piano black parts
Not sure about the 'mirror' differences though...what about their new Keyboard 'Arctosa'.
This text from the razerblueprint site...
Razer has announced two new keyboards: The Razer Arctosa and the Razer Lycosa Mirror Special Edition.The Arcotsa seems to be a simplified Lycosa wihout the USB port and the sound connections(see this comparsion chart for more infos).The Lycosa special edition comes witha high gloss mirror finish of the keytop but without the rubber finish. Overall dimensions and other specs seem to match.Pricewise the Arctosa (available in silver and black) will be 49.99 USD compard to 79.99 USD of the original Lycosa and the Lycosa mirror edition.

This text from the razerblueprint site...
Razer has announced two new keyboards: The Razer Arctosa and the Razer Lycosa Mirror Special Edition.The Arcotsa seems to be a simplified Lycosa wihout the USB port and the sound connections(see this comparsion chart for more infos).The Lycosa special edition comes witha high gloss mirror finish of the keytop but without the rubber finish. Overall dimensions and other specs seem to match.Pricewise the Arctosa (available in silver and black) will be 49.99 USD compard to 79.99 USD of the original Lycosa and the Lycosa mirror edition.