Some rebadges of these have been on sale for 30 and 40 dollars respectively. The obvious difference is lightscribe ability.
I have read some reviews, but was looking to hear the quick and dirty on the major differences from a users perspective. Such as what each excells at, etc…
I heard the 1640 isn’t as good at dual layer burning, but being a newbie I’m not sure how significant that is. It seems it would be quite important to be able to use both layers of data.