I try to get it right now: With the D4 you can switch on and off the flash function of every single head attached, Aditionally you can switch on or off the model light of every single head.
with the scoro, every head can be switched on individually, but the model light can only be switched on or off together.
Thank you Geesbert,
I took a short look in the user manual and had not found the function of separately turning both off, but like I already supposed this obviously was my fault. Anyway, I still don´t see this additional feature missing for our work, YMMV. What´s often used here and was the reason for investing into the bron system is the color control / flash duration alteration. Both brands have excellent packs.
we own (broncolor adapted) ProHeads and I think they are very well made and sturdy, they have a great form factor, cable length feels a bit short though.