Not sure Bianca is very good unless you have a limited card pool.
Probably the best comparison will be to Gregory Gry.
Each are lvl 0 economy allies that give you resources over time. Bianca is less expensive, but higher risk. Her best case scenario is to be +8 resources after 2 activations. Wheras Gregory can be +6 resources without any activations. (assuming you just do other skill tests). In this case, Gregory feels like the winner as the 2 actions you save could just be to gain resources if needed.
If you choose to play her safe, wearing fine clothes and testing X=2, then a second comparison can be to Dario El-Amin.
In this case, Bianca will be +8 resources after 5 activations and Dario will also be +8 resources after 5 activations, but without any risk, more soak and a potential for a stat boost. In this case, Dario feels like the winner.