Even within the stratified world of private jets, there is significant product differentiation.
A small Citation or similarly sized jet would cost a fraction of what a larger BBJ/ACJ would cost. Similarly, the Citation fits a half dozen at most while the BBJ/ACJ could fit dozens depending on the configuration.
Once you charter the aircraft though, you can pretty much take whatever you want subject to limits of available space and regulations (live animals into the UK may be restricted for example).
As a final note, I refer to my CEO who uses his CL-605 regularly for hops around the Middle East and Africa, but prefers to fly Emirates First Class when he heads to Europe. He says that he gets a flat bed, a shower on the A380s, wifi to get some work done en route and the ability to stretch his legs instead of sitting in a small albeit luxurious seat for 7 hours. Private jets aren't always the solution, especially on longer hops where there is regular and reliable scheduled airline service.