I'm just getting into hydroponics. But here's my take on the 2 styles of pots.
The WaterFarm hydroponic pot
http://www.greenfire.net/hot/H500.html cost me about $50 at a hyropontic store. The top is 9 1/2 in sq. and you can put the cutting anywhere on the 9 1/2 x 9 1/2 top.
The hydro pots at this site
http://www.killerhydro.com/hydro/aeroponics2.asp?ItemNo=Aagri
seem so be much more expensive and tell you where to put the cutting.
ThatÂ’s just an observation from the site pic. It's hard to tell much about the size of the pots.
Terry