Yes, they're musically better than your Sonys in every conceivable way. It's not really a fair comparison - the Sony headphones are DJ monitors, and the Alessandros make divine harmonies. The Sonys are better for isolation (both for the listener and the people around), durability, and possibly comfort, but that's about it. You'll be surprised at how the Sony cans sound after you listen to a can like the Alessandro for a month.
If you can stretch your budget a bit higher, the MS-2 will give you even more (soundstage, bass depth, and detail), but they should be powered for a headphone amplifier for optimal performance.
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