With just a quick comparison, I found the Zebra G to be somewhere in between the 048 Falcon and the Natural Slant. I have to admit, I was surprised. It has been a while since I've used the Zebra, but I somehow remembered it to be more flexible. And it's more flexible than the Nikko G. And I've had individual examples of the 048 Falcon that were more flexible than the one I was using in this comparison. But some don't like the huge nib. And it is a big one. Holds a ton of ink but rather awkward to use in an oblique holder. It can be done, but it's long.