Attention to detail-- the rubberized grip and square "no roll off the desk" shape are nice bonus features. The TRU RED highlighter ink is more transparent (lighter)- more readable than Sharpie (although the blue could still be a shade lighter).
My son loves these markers He is autistic and owns thousands of hi-liters and markers We buy them quite often He usually only likes the more expensive ones but these he loves and covets.