I had the 330 for a month and than upgrade to the 550 and use it for a few month and ended up with the Prince (signature line).....
They all have the same house sound of siltech, but going up the line you get more of the same - which is what you want: more dynamics, contrast. naturality and body.
The 330 was too lean in my system, though it is a very good cable and will sound very good in other systems.