Resound quattro vs resound one

The Quattro was the top Resound aid until they introduced the Resound One. I have both and to my way of thinking the One is by far preferable.

That’s strange, as the Quattro have a premium model, the 9 is the premium version and the 7 is “advanced” it’s been that way right through Resounds evolution of HAs and still is with the Ones.