Google AdWords Tips | Need More Data on Headlines and Sub-Headlines?
If you’re still questioning our riffs about headline and sub-headline writing, take a look at this:
2 words.
87% difference.
Convinced yet?
Learn how to write them in our AdWords System Exposed Guide.

it appears that one add had quite a few more impressions. is it possible that someone left the “optimize ads” setting on, thus giving the ad with an early lead an unfair advantage ?