Tabby is waaay different than Russian Blue and Siamese is almost a language to itself.
My Russian Blue ended up at the pound and ended up in the psych ward. When I came to rescue her she was doing the "I'm so glad to see you" trill. Problem is, I'd never heard her trill before so I wasn't 100% sure it was the right cat. However, with me there, she'd settled right down so they could get a proper look at her ear tattoo and identify her properly. We got her chipped the following week.