Qidi Tech 1 - Replicator 1 clone

[Syd_Khaos]

Can anyone please explain to me the fundamental difference between a cartesian printer (like the Qidi) and a delta printer (like a Kossel)?
I totally understand the mechanical differences....I'm asking about the end results. When it comes to the finished product (read: print) how do they vary.

I am asking here first before I start to much research, I have come to value yall opinions and technical input. But my end-game here is to develop a printer myself. I have already said several times I want to build a printer, figured I would personally have alot more fun developing a clone than building a kit.
Kits are no fun, that's not making, its like model car.....meh.

So here are my 2 ideas..just cant decide what to go with...

First idea is a double sized Kossel. This would be easy as the original design is open source. I have noticed that all the kossel kits for sale online are about the size of original design, or mini versions...no one has upsized it seems. If i go this route I want to shoot for kossel with 280+mm round plate and 400(ish)mm on z axis.

The second ides...I found an interesting take on a I3 clone the other night
http://www.ebay.com/itm/Tarantula-i3...3D131644168616
If I go for a cartesian machine its gonna be something like this...layed out a little better though.

I just don't know enough about delta printers to make the desicion between the 2.