I, personally, would go with the Flurry, simply because I can't handle large girths at the moment. I can't even handle the girth on the Flurry, so, if I had to get one right now, I'd go with the Flurry for the time being.
However, if I was able to handle both, I'd eventually splurge on both. Why? Besides them absolutely gorgeous, of course, lol.
Well, despite being made of the O2 material, Cush and Flurry are still very different in design and it would be up to you if you like what both have to offer.
Flurry: longer, much thinner, and has more pronounced ridges beneath the head
Cush: shorter/stouter, much thicker, and has one pronounced ridge beneath the head but another that follows more the entire length of the shaft
Which means that Flurry is more flexible, less girthy, but has more immediate texture that can be directly applied to the g spot vigorously, while Cush would be firmer, more girthy, shorter, but would be very filling and would need to take the entire length of the toy to really appreciate the texture entirety. But because of this, it may make the overall experience more satisfying rather than just thrusting against the g spot. Flurry looks more like the excitement is concentrated more at the head. Not to say the shaft can't be satisfying, but it's just not textured like the Cush.
Although, this is all in theory. I've never tried a larger toy, let alone a textured one. So, it's going to boil down to what you think would be more satisfying to you.
Even if both may be the answer.