Inac mozes si to aj porovnat sam
http://ark.intel.com/Product.aspx?id=41411&code=In tel%C2%AE+Atom%E2%84%A2+Processor+N280+%28512K+Cac he%2c+1.66+GHz%2c+667+MHz+FSB%29
http://ark.intel.com/Product.aspx?id=42503&code=In tel%C2%AE+Atom%E2%84%A2+Processor+N450+%28512K+Cac he%2c+1.66+GHz%29
64bit instrukcie u 32bitoveho OS nevyuzijes nikdy (je to technicky nemozne prepnut na 64bit mod, ked bezi 32bit OS)