Chris,

he 600c is VERY similar,
according to the latest Aviation Consumer review of the 600c (this
month's edition).


Two major differences:

1. Background lighting
The 600c (and the very latest models of the 2000c, it seems) have
cold-cathode lighting, which means the battery lifetime is more than
decent. The old 2000c was weak on that.

2. Processor power
The 600c seems to have a more powerful processor than older 2000c's.
Surprise...

--
Thomas Borchert (EDDH)