In YC, all guests are treated equally, whether in an inside or the best suite in the enclave. Personal service for your cabin totally depends on how good your particular butler is - he/she can be amazing - or less than mediocre. However, the assistant butler can be more helpful. Elsewhere, service is exceptional.
Having experienced The Retreat, the Yacht Club is, overall, a much better product IMHO (except for food offerings, where Luminae has the edge).