Smartphone for travel?

The main differences between these two items are that, the Sony Ericsson XPERIA X1 has Secondary Camera, Touchscreen, FM Radio, GPS and 3G which are not present in T-Mobile Sidekick LX. Both of them contain Audio Player, Video Player, Camera, Bluetooth, QWERTY, Speakerphone and GPRS. The Sony Ericsson XPERIA X1 is a lighter and smaller device than T-Mobile Sidekick LX.