scn18 different batches?

[WOOD27]

I recently bought 2 scn18's 27oz has a white easton end piece On the cap the 28oz has grey easton piece on the cap? Any idea's why they would differ? They both have the 2013 stamp.

 

[Camp]

Because that's just how they do it. No difference. On the first 18s and 18bh they used a completely different cap all together