The devil's in the details, and I think its hard to make too much of an assessment from just model name alone.
Parts on the bikes can vary from country to country.

I'd suggest looking out for these on the bikes :
1. Gear spread over number of speeds
2. Crank/chainring quality (some can be really cheap stamped metal )
3. Flimsiness of the folding areas (not) and safety latches.
4. Reasonable brakes that don't have a tendency to rub

For me, there won't be that much of a bike geometry to fuss over.
They all are 'Dahon' type fold (with the Brizda D8 being the exception).
If there will be things that irritate you over the course of its use, its usually the items mentioned.

I'd also suggest going really easy with the carried stuff.
In fact, maybe no need for more than a 15/20L waterproof bag secured to the rear rack.
1 set of casual clothes;
1 set of cycling clothes;
toiletries
Small towel
Sandals

most stuff are either cheap in the shops in the town you stop for the day or you'd have it in the hotel room.