I have never owned a Spartan blade, but the ones I have handled seem well made and have great fit and finish.
I have owned the zt 0100. I have short fingers, so I found the handle a little uncomfortable. However, I seem to be in the minority on this because a lot of people seem to like the handle a lot. If you have a chance to hold a zt 0200, the handle has a very similar shape.
The tip is tough while still being pointy enough to be very useful.
Its a nice knife, but you should know that the section of the blade near the handle is not sharpened, so you get a sort of a finger choil. I don't think its a mistake in the grinding. Its just the way its designed. The blade is fairly thick with no milling in the handle. As a result, it is fairly heavy for its size.
The sheath is fairly good quality, but I wished it was less bulky.
CPM 3v is a non-stainless tool steel. It is NOT the same as s30v. CPM 3v should be significantly tougher than s35vn, but it is not as stain resistant. The zt 0100 is coated, so I don't think rust would be a big problem for most people.
I liked a lot of things about the zt 0100, but I could not get over the handle comfort. If possible, I would handle it in person before buying one. Some people love the handle, but its not for everyone.
Hope that helps.