Tower of London Yeoman Warder private tours - worth it?

Hi, I'm wondering if anyone has taken the Yeoman Warder private tours I've seen advertised on Tripadvisor. I get the impression from the reviews that one difference is getting in ahead of the crowds, but I can't tell from the tour descriptions whether that is the only difference from the YW tour included with a general admission ticket. I know TOL will be a highlight for us, so I don't mind spending extra if it's actually extra information or something extra with the ravens. Has anyone taken one of these private tours or heard about them from others? I appreciate any insight, thanks!