IT Week Labs, a UK-based blog, compares the Eee PC 901 and Acer Aspire One based on early usage feedback. Some facts of comparison:
Eee PC 901: 1.15 kg (2.53 lbs) with 6-cell battery, battery life of “several hours”, StarOffice 8
Aspire One: 1.26 kg (2.78 lb) with 6-cell, “just over two hours” on the 3-cell, OpenOffice.org 2.3