DOORBRIM Rain Diverter Over Door vs a PEMKO 346 Drip Edge.

Here are the main advantages of a DOORBRIM rain diverter over a door compared with a Pemko 346 drip edge/drip cap:

AdvantageDOORBRIM Rain DiverterPemko 346 Drip Edge
More coverageProjects about 7.5 inches out from the wall, helping shield the top of the door area.Projects about 2.5 inches and is mainly a narrow drip strip.  
Better for heavy rainDesigned to move rain away before it reaches the top of the door, trim, jamb, or threshold area.Helps deflect water from the top gap, but does not create much overhead coverage.
Protects more than the door gapHelps protect the door header, trim, jamb, hardware area, and threshold from direct water runoff.Primarily protects the gap at the top or bottom of the door.  
Wall-mounted hood designMounts above the opening like a small protective hood.Mounts to the frame/head as a drip strip.  
Has a larger rain-management profileDOORBRIM has an integral front gutter-style shape to guide water away.Pemko 346 is a simple aluminum projection strip.
Better appearance for residential/shed useLooks more like a finished mini-awning/rain hood.Looks more like commercial door hardware.
Useful above windows and equipment tooCan be used over doors, windows, electrical boxes, meter banks, and similar wall-mounted openings.Sold mainly as door top/bottom weatherstrip or overhead rain drip.
Complete installation kitDoorBrim kits include matching fasteners, silicone caulk, and a drill bit.Pemko 346 listings typically include screws, but not a full sealing/install kit.  
More color-matched product lookAvailable in factory UV-protected colors like Almond, Beige, and Gray.Common finishes are clear anodized, dark bronze, gold anodized, and painted white aluminum.  
Stronger selling messageEasier to explain to customers: “keeps rain away from the door.”More technical: “door top weatherstrip / drip cap.”

The following reviews are from verified customers:

1) Flashing A Door Rough Opening Is A Very Important Step That Is Often Skipped When Installing A New Door.

      A) This Method Demonstrates The Use Of A Modified Material To Construct A Pan On A Wood Subfloor.

         See Video http://www.finehomebuilding.com/How-To/Video/Flash-Rough-Opening.aspx.

      B) This Method Demonstrates The Use Of A Metal Pan On A Wood Subfloor. Installing French Doors – Journal Of Light Construction (FEB 2010)

2) We also Highly Recommend Using The New Composite Pre-Hung Doors With Integral Threshold Similar To The  Endura Framesaver. The Bottom 8-12 inches Of These Frames Are Made Of Composite Wood Guaranteed For Life Against Termites And Rot. Check Out Their Videos. I Also Suggest Using Composite Or PVC Door Brick Moldings And A Pre-Made Sloped Sill Pan.  ENDURA PRODUCTS