All very useful information, particularly the Jifo using Jifo-specific parts. That is good to know and will definitely influence my decision.
I'm looking at performance from a general point of view:
AFAIK the Uno is quite fast for an SS, easy to ride and low maintenance with a light+small footprint when folded. It can be used to carry stuff on the back. It also has relatively strong support in Singapore and Australia.
The downside would probably be the price. I've looked at the Tern Link Uno and Speed Uno but they're all in the 11-12kg range. I will definitely have to try them out at the local bike shop to see if the difference in kg is worth the price.