Here an example for two similar products: one received 100 «like» by buyersvs the other product received an average rating of 2 stars out of 3 by 200 buyers. Which one do you buy?
The concept of "like" vs "stars" do not have the same power, I'm pretty sure of it. And that, even for a product or for a blog post. But wich one is better? So I decided to do severals smalls but efficient user researches and I've found that users 52% users preferred "stars" over "like" buy a product and 51% preferred "like" over "stars" to choose which blog post they will give their attention.
I'm going nowhere. What do you think?
P.S.: Don't let me start with 5 stars rating or notes on 10 points. That's bad.