Ultimately what I use depends on FEATURES. I don't care about fedidrama.
If Firefish develops features faster than Iceshrimp I'll switch.
If Iceshrimp develops features faster than Firefish I'll stay.
So FAR, I'm finding very hard to run my own dev version with Iceshrimp while with FF it's damn easy.
I might drop them both and use the one of my goddess since she's much better coder than I'll ever be, and she'll merge whatever's good from either anyway.