The gadget websites is wrong about that Samsung will release different Galaxy Note 3 models. It's a complete misunderstanding. Samsung is just testing different prototypes with different displays and processors before they decide which one to use.
The only different models there will be is the US version and the European version. They usually only differs when it comes to the processor, either a Qualcomm 800 or a Exynos 5 Octa processor.
The reason for this misunderstanding is because these different prototypes shows up in web logs, benchmarks and more, and then one or two websites writes that Samsung will release different versions of the Note this time, and then the avalanche is started and all blogs and websites writes the same thing.
I don't believe in that rumor, not for a second.
It will be interesting to see though, if Samsung will replace the plastic shell with something more cooler, more interesting this time.
And it will also be interesting to see if the Note 3 will have a 5.99-inch display that I believe, or just a 5.7-inch as the latest rumors says ;)