I am both an eventer and a hunter/jumper and let me tell you, confusion abounds when you ride a warmblood with a hunter coach every saturday and a TB with an eventer every sunday (never mind the rest of the week!) I show both disciplines so I hope I can give you some advice...when it comes to day to day work, obviously every horse is different but in general, eventers school to create a bold, fit horse who can get out of trouble cross country, as well as dressage movements that help their horses improve suppleness and self-carriage. Hunters, on the other hand, are generally bred and trained to go in a frame so the emphasis is less on dressage (some trainers even advocate that this precise schooling takes the 'jump' out of their hunters) per se, and more on creating a soft, accepting horse who can canter smoothly down to a jump, find a distance and make it look easy. Therefore hunters are a lot more appearance-oriented. Jumpers essentially all ride in GPA/IRH stripe helmets, black field boots, beige or white breeches, and coloured show shirts. some show in coats, some don't. most use running martingales and jumper boots. a loooooooot of hunters use white sheepskin "jumper" half-pads (the really expensive ones), especially during the summer.
hunters and jumpers are usually rather more pampered than eventers. it takes a certain "make" of horse to do the hunter disciplines, whereas in eventing you can take a 'mutt' out of someone's backyard and go win advanced with him. that's a loooot less common in the hunters. again, h/j is all about style, which means that 'pretty' riders can win a whole lot on their $50k warmbloods, but set them a cross course and they'll be off before the first fence *sigh*. anwho it's an entirely different world out there, at least in Canada and the US! if you're looking for examples of what h/j riders wear to show go to
www.aerso.ca, and click on the camera on the right side of the screen, and check out any of the Hodgsons or Pepiniere show pictures (or Kirtons H/J).
dunno if this is at all what you wanted, but there you are. best of luck!