What's the difference between Upper Deck SP and SPA?

[Jalbert009]

Hi guys, I want to collect a small recent set and I have Upper Deck SP and Upper Deck SP Authentic in mind. There are only 100 cards in those sets.

Can anyone tell me the major differences between the 2 sets? Because when I saw a few cards of each set they looked quite similar besides the color of the markings of SP.

Thanks!

 

[warrick131]

SP is the retail version of SP Authentic.