I own both a Primaluna Prologue Two and the Sophia Baby. They sound very similar to me except that the Primaluna has MUCH more "impact" and a MUCH more powerful bass. The Primaluna's power rating gives it a LOT more headroom. The Baby's not quite broken in yet, and seems to be quite light in the bass. The build quality of the Primaluna is extraordinary. You get a LOT for the money. A VERY high quality piece of work.
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