They both look like a straight implementation of the Whitcomb winglet upper part.
I have studied winglets quite a lot to come to some conclusion how to handle them in my airliner performance model, the best all-inclusive paper I found was this one from Doug McLean at Boeing:
It shows that what is written at Wikipedia is a little wrong in it's conclusions (talks about what happens at the wingtip which is wrong, it is about what happen at the complete trailing edge of the wing). Essentially the McLean paper says (and many more advanced studies says the same, eg Ning and Kroo Stanford 2008):
- Winglets function to increase the equivalent span of the aircraft. It is not about what happens at the wingtip but what happens behind the complete wing. Therefore wingtip devices work by shifting the lift distribution outward.
- If one does it with a winglet, a tip extension or some other device like a fence, they all use the same mechanism of virtually extending the span, ie shift the lift distribution outward.
- For a classical winglet you can count the effective span increase as 45% of the physical size of the device, for a raked tip 80%, for an Airbus style fence as a 2% extension of the wing span.
- All other things being equal the raked tip gives a lower total weight increase as it does not induce the same wing torsion moment but it's has the negative it increases gate space requirements.
So the bottom line is they seem very similar and as they are rather small they are not to effective (their sharp bend might also cause transonic drag effects).
If you go to the bother of making a tip device, make it big to get a significant effect and make the transition smooth to avoid interference drag (the smoothest being the true Sharkfins of the A350
). If you have span to spear and are an owner of the patent (B), make a raked tip (the tip is raked due to tip-stall considerations, there is no slat out there so you better pass 60° rake to get a stable vortex at high alfa and thus a stable tip roll moment).
[Edited 2013-04-06 18:24:02]