I have tuned a couple of efi projects and I will mention somthing many seem to not get right away. When intake air/fuel distribution is good with a carb, its generally good with an efi system. Just like carbed systems, efi gains from good intake air and fuel flow. I know this because I have run a couple systems and then changed or modded the intake and performance improved.

What efi does that a carb does not, is atomize the fuel better. Smaller droplets, but at a higher pressure. So you may have to tinker with the intake and spacers and porting. Generally any porting that benefits a carb will benefit and efi system. Efi generally likes a single plane style intake plenum best. With the higher fuel pressure the droplets come out at, they find less obstructions in the intake with a open plenum and its therefore pretty responsive.

For dual plan intakes, I found cutting/thinning the divider way down and using an open 1" spacer really helped on one of my projects. And just like a carbed system, I was pulling all 8 plugs to see what they all looked like after a run. When its right, they will all be very similar in color....

Generally, tuning a finicky intake/cam with efi, a good Idle is the toughest thing to get right. Once that's good, life gets better.

Me, I would try it....Nothing on your end seems too radical with your setup. Call each company and interview someone who knows their product and then decide which would work best. I like the self learning feature....Never want another efi without it.

I used to run a 431&484 cube Hemi with a 2100cfm tunnel ram with bug catcher efi on the street...Cam was no fun with that much air flow on tap...