I have been looking at these two units and cant figure out witch one is better.

this one here has a 5 micron filter

http://cgi.ebay.com/ws/eBayISAPI.dll...%3AIT&rd=1

and this one had a 1 micron filter

http://cgi.ebay.com/ws/eBayISAPI.dll...%3AIT&rd=1

So my question is, Is a 1 micron better than a 5 micron?