Sony doesnt make that great of a notebook. first, it is that they load a bunch of crapware on the system. Not good if you want something clean for business or design. Lenovo make great notbooks that will far surpass the viao for what you need it for. Basically you are paying for quality and support. Because Lenovo is a business class notbook supplier, you should be able to get much better support than viao. I would upgrade the memory on the lenovo to 2gb for better performance though.
Edit: The Lenovo will run much faster anyway because of the P8100 processor.