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I was just guessing maybe when potential customers back in the 80s had the vortex demonstrated to them they probably found the motor not quiet enough to warrant spending the extra coin. It is no doubt quieter, but not significantly.
I remember seeing one back in 88 and was disappointed in how it sounded just as noisy as any other Victa.
I was expecting it to sound a 1950s flying saucer sound effect with the way it looked!
I don't know how people would have gotten demonstrations from department stores. It would have been a case of opening the box after buying one with high expectations.
I have noticed a difference with my bomby yellow Vortex but that's only after hearing another PT beforehand. The difference didn't at all live up to (my) expectations.
