Difference between Metal and Metal X from OPC????

[lemieuxl66]

Can anyone tell me what I am looking for to distinguish the two. Opened up two boxes and have no idea how to tell the difference.

Thanks in advance

 

[winniescards]

If you are familiar with Topps chrome.Than it is no problem to tell.The metal cards are rather dark with not a lot of shine,very similiar to regular chrome.While the metal X are like the refractors from Topps Chrome.They have and make like a rain bow .Under light it is really easy to tell.