There is little difference between a close contact and jumping saddle. Both have a flatter seat than an all purpose with the gneral idea that it helps the rider get out of the saddle in a two-point. A saddle made for "jumping", usually show jumper types, have slightly more forward flaps than a close contact saddle. This helps when the jumps get higher. If you have longer legs than you might want to go with the jumping saddle to get that more forward flap to accomodate your knee when your irons get shorter, though I believe either of these types of saddle come with a longer flap option.
When I was jumping I always tended towards a close contact just out of choice and habit..it was what I was used to. I didn't like the overly forward flap of the jumping saddles.
75-80cm is calculating as about 2 feet..at this point I would say it is comfort preference. If you have a friend and/or friends from which you can borrow the saddles, ride and jump in both and see which you prefer. At your current jumping height I don't believe the slight differences between the two will really be noticeable unless, as indicated earlier, you have a longer leg that needs the extra room the forward flap would give you.