Photo quality depends on ccd size.
10 megapixel ccd 1/2.33 samsung photo quality is not better than 8 megapixel 1/2.5 olympus one
personally, I think the appearance of these two machines you prefer which one you buy (of course, also have to consider the price)
but samsung one is a new product, there is no problem of refurbished machine, olympus is out in january of 2008, it is easy to buy refurbished machine. buy a refurbished machine. If you are going to a big digital appliance store (Gome Yongle Suning) or a big box supermarket to buy licensed products, then there is no trouble with refurbished machines. But if you want to go to buy water goods, or Samsung that insurance.