Make no mistake, Seanski - the Rajah II is huge. It'll take some getting used to before you can carry it without discomfort. I've found that, because of its size, I've had to come up with a different carry configuration for each pair of pants I own (not all pockets are identical in depth or breadth).
That being said, the Rajah II is an excellent EDC if you can manage it physically (not to mention legally - it is a fearsome knife and some jurisdictions may frown upon it).
I held a Spartan once at the Cold Steel parking lot sale. It is much lighter than the Rajah II and offers a similar recurve blade shape. The handle on the Spartan is probably its biggest feature. If you've got just the right hand size, you'll feel like the knife was welded to your fist - it's SOLID.
It all comes down to what you want to do with the knife. If you're looking for a light EDC knife with good cutting power and a solid grip, go with the Spartan. If you're looking for a heavy duty chopper that you can fold up and pull out of your pocket to scare your friends and relatives, the Rajah II is a good purchase. If you're looking for a heavy duty chopper and don't really care about shocking or impressing people, then just grab a Cold Steel Trail Hawk instead. Those things are cheap and they'll survive the apocalypse.