From the HBS study case "Clean Edge Razor: Splitting Hairs in Product Positioning"

You can see the entire case in this link, is short and there is no need to download it:

https://www.academia.edu/34893515/Clean_Edge_Razor_Splitting_Hairs_in_Product_Positioning

QUESTION:

What are the arguments for launching Clean Edge as a mainstream product and what are the arguments for launching Clean Edge as a niche product?

Please detailed arguments for the 2 alternatives:

1) Mainstream product

2) Niche product