FPR 1:1 or rising rate ?

[smoker]

Hi I'm looking into buying a FPR and it seems there is two sorts - rising rate and 1:1. Does anyone know which works best ?.
Ideally I'd like to drop the fuel pressure a little over standard when i'm crusing on the motorway to burn a bit less fuel and keep the pressure where it is now on boost.I'm thinking the rising rate would work best ?

[30psi]

The rising rate would work best, but I would avoid using one to be honest.

[sideways danny]

you don't need rising rate. on a turbo car you connect the vacuum pipe to the AFM and the boost pressure and base pressure add together to give you total fuel pressure. Rising rate is useful on NA cars when not using a vac signal IMO