I have a Hahns Macaw and I really like him. I do not have personal experience with other min macaw species whether it be Severe, Yellow Collared, or Illigers macaws. I have seen people post stating Severe macaws are the most difficult mini macaws. You already have a Amazon and medium/ large bird experience so I am sure whatever mini macaw you choose I do not doubt will be fine for you. Depending on what species of min macaw you decide on your min macaw might be about the same size or a little bit littler then your Amazon. They say Hahn's macaws are more likely to talk out of the mini macaw species. My bird (who is under a year old and a baby) in a baby voice already says step up.