What is the difference between a single port vs all port splitter

Also labeled as power passive. I've googled but maybe I didn't phrase
the search right.

Here are two urls but there is no other info there so no point in
looking!


Both have:
This 2 way splitter pass both low and high frequencies so it can be used
with a terrestrial antenna, cable TV or satellite.

Passes 5-2600 MHz signals
Works with Cable TV, Terestrial Antenna, and Satellite

All port power passive $2.39
http://www.solidsignal.com/pview.asp...2AP%29&q=p7002

versus Single port power passive $3.99
http://www.solidsignal.com/pview.asp...Splitters&sku=

I'd think it would cost more money to have all the ports.

Thanks.