apt-caher or approx?

["Andrés Ghigliazza" <tizone@gmail.com>]

Hi there,

We will soon have, 5 or 6 Debian boxs (servers and desktops), in our
LAN. We would like to know, if it is better to use apt-cacher o approx
for the updates.

I couldn't find enough documentation of any of them, to see some
features, before installing one.

Thanks very much,

tizo