Saki,
The Sason is in a whole other league across the board. It had better be at over four times the price of the Decapo i. Still, the Decapo is a great little speaker at it's price point and above. Though not perfect, it's a great communicator.
I assume you're asking about the Sason at low listening levels. For a lot of reasons, this is an area that we think should be an acid test for any speaker. As one of many design goals, this is another area we feel the Sason sets a standard.
Cheers!
Robert
RSAD