Hi Doggers,
Seaswirl, Trophy, Sea Pro and the like are all great boats however they are not in the same league of build and quality as a Robalo.
Robalo's were never marketed in Australia hence the uncertainty of the brand, you may find that resale value wont be as good as a Trophy for this reason. I can tell you from experience (Ive been in both boats), they are not comparable. Robalo are a heavy constructed boat.
To give you an idea, the boats you mention are a "Mid Range" boats if your talking US standards, there are worse, but there are definitely a lot better.