But the 3DS IS a downgrade.
Vita: 2 analog stick, higher resolution, bigger and higher quality screen, CAPACITIVE touch screen, rear touch pad, trophies, no friend code friend list, messages, stronger specs(quad core reaching the GHz speed), easy game update, ps plus, proprietary memory cards, no region lock, memory card trick to switch accounts, fast and functioning Youtube app and browser, more apps, can play PSP and PS1 games available from the PSN Store, can connect to PS3 and PS4, bad camera, Sony exclusives, lots of indie, king of the niche titles, more gaems(613) = COMPLETE DOWNGRADE
3DS: 1 analog nub/pad(like the psp), lower resolution, smaller screen than Vita(for both models), RESISTIVE bottom touch screen, friend codes, 3D effect, CPU with speed lower or close to the PSP, no optional subscriptions, region lock, no way to change accounts at all, can use SD cards, slow and buggy Youtube app and browser, less apps, backward compatible with DS games, cannot connect to the Wii and barely any connection to the Wii U, bad camera, Nintendo exclusives, not a lot of niche titles, less gaems(504) = COMPLETE UPGRADE