Sony Ericsson launched Z530, their latest clamshell with music features just as we expect the W300 model to hit the market.
At first glance, the two phones look very similar since they have exactly the same dimensions, but the W300 has more features and a better display.
The Sony Ericsson Z530 seems to be the first officially released phone working with the new Memory Stick Micro (M2) card type. The advantage of Z530 is the expected lower price.
Relatively small size & weight
Memory card slot