The problem with the Brompton is that it has its front carrier block just above the front brake caliper.
A caliper with a top centered cable or hose output is a problem because it interferes with the front carrier block.
It is the reason why Brompton uses a special caliper with a down left cable output instead of the usual top right cable output of all front brake caliper.
A Brompton without front carrier block or the above Dahon has no problem with a top centered or right hose output.
Note that the Brompton also need a medium reach caliper, short reach brake calipers can only be mounted on the Brompton with an adapter.