2.6.18-4 or 2.6.18-6

["michael" <michael@estone.ca>]

I was noticing that there is a list of packages to install if you run
# apt-get install linux-image

I'm currently running 2.6.18-4-amd64
But I noticed there is a 2.6.18-6-amd64

Whats the difference between these?

Thanks,