The The Ultra which I have is brighter with a wide somewhat bright corona. The HP uses the same reflector so it should produce a tighter beam than the Scorpion although not as bright as the Ultra. The Stinger is marginally brighter but has a wider bright spot. The HP should prove out brighter plus is rechargeable so the agony of using it is gone.
Plus if you have a Scorpion you might want to look into the XP version of the Stingers. They have a tail switch and would be similar in operation to the Scorpion. The regular Stingers (regular and HP) have a switch up by the lamp ala most other lights. Some find the switch there to be "alien" as they are used to tactical switches. [img]/ubbthreads/images/graemlins/icon3.gif[/img]