Good question ....
I would have thought the aerodynamics were identical .. regardless of whether the type starts with an A or a B ....
I can understand improvements ... but I would have thought they would almost mirror each others research ...
The wingtip "triangle" on the A380 is the same as the A320 30 years ago ... ??
With the MPA B737 maybe the raked wingtips have better turbulence penetration characteristics for low level surface probes ...