CTO vs. VP of Engineering in small companies

Summary:
https://medium.com/engineering-leadership/defining-roles-cto-and-or-vp-engineering-f1c7563643a3

Dates of articles are not intended to reflect a rate of change in the definition of roles, but to show the persistence of elements of the definitions across recent history.

2007:
http://www.feld.com/wp/archives/2007/10/cto-vs-vp-engineering.html

2011:
http://avc.com/2011/10/vp-engineering-vs-cto/

2012:
http://www.slideshare.net/bcantrill/cto-vs-vp-of-engineering

undated:
http://www.bothsidesofthetable.com/want-to-know-difference-between-a-cto-and-a-vp-of-engineering/