Don't go for the C7s, if it is a C7a, it would be better. The steel frame of the C7s is a bit heavy. The best option in your case is the Boardwalk. The Tern with the same specs but cost more is of no advantage. So, scrap that also. Does the Route comes in Akibo colours also?    I know Boardwalk has the Akibo but Route ???

If your 9 'yo' is going to ride it, just make sure he/she won't just ride and leave outside somewhere to buy something or get something. When that happens, you will notice the bike will be gone in 60 seconds. A few years ago, not many people know that there are expensive foldies also and very in-demand. Now everybody knows that and robbers who used to target roadbikes are also targetting foldies nowadays. A forummer here lost his Dahon when someone broke into his car. In fact he told me, he lost the whole set, helmet, bike and even jersey. 

dahon vybe dont have adjustable height handlepost.thats why u adopt the litepro stem backward.

if u got budget, try to get dahon adjustable handle post,might help on the height, but still u need that litepro stem to adjust the handle nearer to ur daughter.or try to get the butterfly handle bar with 25.4mm clamp size

I'm from kuantan.
Budget 1000-1500