Jillian Patrie | University of Minnesota Yard and Garden Extension ...
The most important difference is cost. Compared to their red, yellow and orange brethren, green bell peppers are much cheaper on average—around 40% cheaper. Green peppers aren't as sweet ...
"Green — unripe — bell peppers have a sharper, slightly bitter taste, while red, orange and yellow bell peppers have a neutral to slightly sweet taste." Bell peppers are a nutrient powerhouse.