The following is a simple picture I drew and colored to highlight the differences in color and quality in each of the different gel pen brands tested.
Test Picture Colored with Blinki Gel Pens
Test Picture Colored with Dats Gel Pens
Test Picture Colored with Freelimit Gel Pens
Test Picture Colored with Gel n Roll Gel Pens
Test Picture Colored with Jotz Gel Pens
Test Picture Colored with Kaiser Colour Gel Pens
Test Picture Colored with Kids & Co Gel Pens
Test Picture Colored with Officeworks Gel Pens
Test Picture Colored with Spot Print Gel Pens
Test Picture Colored with Woolworths Gel Pens
Test Picture Colored with Yoobi Gel Pens
Test Picture Colored with Super Doodle Gel Pens