The question is, do you want to carry your mobile internet device with you everywhere? If not, then probably the Samsung would be a good bet, but be warned, it wont fit in your pocket.
Integrated into the keyboard layout is a new feature for UMPCs - an optical mouse. Its the first time I've ever used or even seen one and I have to say, as a mouse pointer fan, that its the best mouse pointer I've ever tested. Its quick to get used to, accurate and even feels nice to touch. It operates like a mini roller-ball and when you press it down, you get a left mouse click. Its faster, easier and more accurate than using a finger or pen and when used with the 'FN' key, it turns it into a scrollwheel. Its great! Oh, and while I'm talking about that FN key, let me mention that it modifies the action of about 10 buttons. For example it turns the optical mouse button into a right mouse button, it turns the volume rocker into a screen brightness rocker, it turns the mute button into a lock button, there's also a number of functions under the normal functions keys like LAN enable, WAN enable, rotate lock, LCD off and cursor/gamepad mode (where the cursor control can be used as an 8-way joystick and the 1-6 buttons correspond to joystick buttons.