[tj303]

Trap is easier to learn than skeet.
Skeet is easier to master than trap.

Trap has 5 shooting stations and 1 trap house. There is only 1 target (unless shooting doubles then all are 2 targets). All targets are going away from the shooter.
Skeet has 8 shooting stations, 2 houses, singles and doubles at four stations, singles only at four stations. There are out going and incoming targets.
There is much more to learn in skeet making the game more difficult to learn, BUT the targets always fly the same direction. The fact the shooter knows where the target is going makes the game easier to master.
Trap has an oscillating machine so there is uncertainty of where the target will fly, this uncertainty makes Trap a harder game to master.

IMHO,
TJ