Many moons ago, I walked the cross-country courses for the Advanced at Ship’s Quarters and the USPC Nationals in the same weekend. The Ship’s Quarters course was substantial but not terrifying. Professionals on well-trained horses were planning to go bouncing about over piles of logs and have a lovely time. Mind you this was back in the dark ages before cross-country was show-jumping in the open over fine furniture.
On the other hand, the Pony Club course, approximately Preliminary level, loomed far larger. A friend of mine and a horse from my barn were actually planning to go over these [on course photo here]. While technically lower and less complicated, the jumps were far more intimidating by association.
Then there are the Baby Novice and Beginner Jumper fences that I go over. These are ENORMOUS!