All I can tell you is when I got my Spirit I weighted it at the following:
210g Spirit, (368g with bit-wrench kit (full) and Victorinox leather case)
I didn't weigh the Ratchet model when I got it, but it would be slightly heavier than wrench model.
My Leather case was also not the best it can't hold the ratchet, extension, and corkscrew, but they must have changed it at some point because some on here showed one that would and they had change the internal compartments around and swapped the plier position with the accessories, it looked better.
With all the talk of Black Oxide ones, I had to get one to test it out. I got it with no bit-kit and the black nylon pouch is super slip compared to the leather case with bit-kit. I love the slim nylon case. I've had it on the belt for a few days just for fun, usually my regular spirit is in my bag, not on a belt. The Spirit alone is really nice if you need to carry it on a belt. I might get a separate case for the Bit-kit/Ratchet since they are so handy and would fit in a small case. So I'm no thinking 1 case for everything is nice, but for belt I'd separate them.