Except that when a carb'd engine runs too rich or too lean, its 'tone of voice' changes a little, whereas a well set up EFI is always on point, I don't think there's a different sound.
Modern aftermarket EFI systems seem mature. Once correctly set up, they don't have a reputation for needing any onging tinkering.
Here are some leads:
Pro-M Racing Mass Air Sequential Port EFI System
https://www.promracing.com/complete-...i-systems.html (expensive, maybe the best: mass airflow and sequential port injection, same source as Ford OEM)
FAST EZ-EFI Multi Port EFI Kit
https://www.fuelairspark.com/ez-efir...ttle-body.html
Holley
https://www.holley.com/products/fuel...on/legacy_efi/
Edelbrock
https://www.edelbrock.com/shop/fuel-..._list_dir=desc
FiTech
https://fitechefi.com/product-catego...ort-injection/
There are more out there, but there's a start. I'm sure some of the guys here running EFI will chime in on their experiences.