Mini Velo : Just ordered one of these

A short (5'-5' 2") older relative is planning on moving into a camper and was asking about a bike.

A mini-velo or a Brompton seem like sensible options.

Not sure of their budget. It'll be the last bike they buy so they said they're happy not to skim. But to a non-bike person that's usually means £500-700 rather than £1,5k.

So my questions are:

1. Is a mini velo actually smaller and lighter than a normal bike?
   
2. Is a mini velo better than a Brompton?
   
3. Does anyone have otp recommendations? (it would have to have decent gearing for a 60yo onwards)
   
   

Cheers.