I'm sorry if I wasn't clear, I don't own one, but in my younger days at the conservatory, all the students and teachers (about 25-30), all had Gola 454's. I was the only person there with a Free Bass that wasn't a Gola, so I had a chance to play them several times.
So, having some experience with all three, I was able to speak about each from first hand experience about the feel of each accordion.
Originally when I was 13 years old my parents had ordered the Gola for me, and long story short, somehow a mistake was made and when my parents flew in to the Trossingen factory, it was not ready. They were able to rush assemble my Morino and that is what I play today. It's a long and kind of fun story to read, and it's detailed on my website. In the early 70's the price difference between a Gola and Morino was very close, quite unlike today.
The Gola is my personal choice for "my ultimate accordion if I won the lottery".