A TBI system if well tuned both with intake port balance and fuel controls may have some improvements over carb. The improvements would mainly be due to temperature compensations and O2 closed loop control. If TBI not properly tuned, a carb wins for simplicity, cost and the ability to drive around problems, using careful foot on the pedal control.
My observation of crude capability is not based on trying the system, but looking at the available tune settings via the programming interface. I compared those with features I developed, and have applied on many engines. There is a huge difference between getting an engine to run, and getting optimal performance for both power and economy. Settings need to be refined in a way to make adjustments based on more table points. Tuning tables need to follow engine dynamics of volumetric efficiency for fuel, and flame travel speed on ignition. The tables are surfaces with valleys, slopes and peaks.
To put this in perspective, the Fi system tunes ignition with a 3 x 3 matrix. I use a 16 x 10, this is RPM x MAP. Comparing 9 cells to 160, suggest a huge difference, modern OEM systems are more than double what I use.
I can go on about much more, but do not want to hijack the thread.
