The Difference is, that you don't have to run an dedicate Server, witch uses his one Ram and CPU-Power.
You just use the MC integrate Server to run the World.
As i am have test it, it's seems that this config (MC-Internal-Server + Client) don't need as much Power, as MC-Dedicate-Server + Client on the same Hardware.
Don't know why an of course not if this just for me, ore a Fact...
A Fact is, of course, that the Integrated Server ind Client share the same RAM-Space and CPU-Power. So you just have to give one Prog. enough Ram-Space and the Sub-Progs. decide witch need how much Resources. And that, so to speak, for every single CPU-Cycle...
The other thing is, that you don't have to care about Server-Site and Client-Site Mods (not all Mods needs to run on Server-Site and some wouldn't run on Server-Site... letting him crash) and with there Configs.
With this, maintaining the "Server" is much much easier. Obviously because you don't have one
Why is this in the Thred?
I had posted this in an PM... didn't i?
(because it's oftopic)