Compare and contrast music analysis (Britney Spears & Laura Marling)

I have chosen to analyse a video each by Laura Marling (Folk genre) and Britney Spears (Pop genre). Both are solo females artists who are very popular within their own genre and represent their style through their music and videos. The two videos are Sophia (Laura Marling) and I Wanna Go (Britney spears), both of which are their two latest music video so I would only be comparing their most recent work as it would be unfair to look at videos from different times as technology and music have both changed.

Tempo
Lighting
Colour scheme
Editing
Transition of shots
Effects