Sorry, I meant math camps in general. Although we looked at "Mathcamp" and liked what we saw, the dates did not work for DD. Most of the selective camps have similar setups; a test for admission and then multiple courses spread over 4-8 weeks. Some let you select from an array of classes with different levels, but some everyone takes the same thing. Most post course descriptions and prerequisites. DD advises that if the test is easy, the camp is easy and if there is no test "there is no point". I would not go that far, but she did find some camps were intended more as "math enrichment" than "math, math, more math". DD prefers "math, math, more math, even more math, wild dorm party" LOL
Back to your question: Within the class there may not be much differentiation, but the hope is that the topic will be both completely novel and very challenging to advanced high school students and thus interesting. The selective camps DD chose had tests that were very hard for her and courses that she thought would be interesting. She especially liked the camps where college professors taught as the ones with high school teachers were less rigorous. Some camps have syllabi for the courses posted online ( I believe Mathcamp does this).