The short answer
Compare built work, not renders; confirm registration and scope in writing; and meet the person who will actually run your project.
Start with built projects of a similar type and budget — visit one if you can. Ask who will handle your project day to day, since the principal who pitches may not be the architect who draws.
Then confirm council registration, a written scope with exclusions, a fee basis and a payment schedule tied to deliverables. A practice that answers these clearly before you ask is usually the safer choice.
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