This. I'd intended to post this in @Bortz's thread.It isn't any better. It's the same as the old DSTwo. You can still only set the processor speed in the emus to a maximum of 396mhz, which isn't good enough to run Snes and GBA at full speed without frameskip. If the cpu is truly faster on the DSTwo+ in DS mode, the emus would need to be edited and recompiled to allow for a faster processor speed than 396mhz.
The emulators will need to be updated by their respective authors to take advantage of the new specs. They won't just magically know they're running on better hardware.