I bought a Vita in June and a 3DS in November.
I love them both, they are awesome.
PS Vita: 85%
3DS: 80%
I only think Vita is better because of Playstation Plus. The hardware is better quality obviously, but the 3DS Xl is very well designed too i think
Xbox One, PS4 and Switch (+ Many Retro Consoles)
'When the people are being beaten with a stick, they are not much happier if it is called the people's stick'- Mikhail Bakunin
Prediction: Switch will sell better than Wii U Lifetime Sales by Jan 1st 2018