If you run an EFR you will want to run it with an SX-E style compressor cover. On our cars, how the EFR's react with the intake and just the natural frequencies, it creates a really audible noise in the cabin that sounds like a squeal and can be quite an annoyance. With that comes the need to have a blow off valve put somewhere in the charge pipe system.
Full Races website says it is a twin scroll setup, but the manifold and turbo combo they build for D-Sport mag was T25 flanged (as well as what is pictured on their website). If it is in fact a twin scroll T4 setup, then that is the way to go. If it is the T25 setup, then I would push Peron out of the UK to sell you their T4 twin scroll setup. The T4 divided will spool just as fast as the T25, but with way more power potential as well as opening up more turbocharger options down the road without needing a different manifold.