Philips 16x dvd-writer very cheap!

Last week I bought a Benq DW1600A for € 135,-. Now the same store is going to sell a phillips 16x burner voor € 88,00 :a :a

http://shop.informatique.nl/cgi-win/iqshop.xgi?M=I&A=412092

this Philips looks like the benq 1600A, can it be upgraded to 1620A? And is there any way to backup the original firmware?