Yes, there are similarities between Sanders and Johnson — but their political philosophies are miles apart. For example Gar Johnson doesn't think government should enforce income equality, but he is for equal opportunity. But these ideas are diametrically opposed!
Compare the 2016 presidential candidate positions on issues. See where Clinton, Trump, Johnson, and Stein stand on issues in a simple, side-by-side format. Another nonpartisan election presentation from ProCon.org.