Bonhams / Christie’s / Sotheby’s- What’s the difference?

My apologies if this is in the wrong thread. If this is in the incorrect place, could someone point me in the right direction?

I’m just curious… What is makes these auction houses different? Or is there no difference and they are just three different auction houses that operate in the same way?

Im not looking for a particular answer, of course. Can be anything from departments, company culture, more traditional, etc.

Thank you!

I’m asking because I have an interview with one of the auction houses for an entry level training position. Any suggestions on questions I can ask would be much appreciated!! Thank you. My degrees trained me more for the museum / art historical academia culture so I am a bit lost… and I’m trying to not appear lost during my interview, 😂.