All are similar right now: FFC not working, streaming apps, toggling to grab data connection, and a multitude of various things across the ICS ROM cross-section. I've loaded them all and IMHO they all are great, but being in alpha you've gotta expect that things won't be flawless and everything working just yet.
Tons of updates are coming out literally on a daily basis (team gummy with 4 days straight of updates!) and things are getting fixed all the time. I run the Gummy ICS because I love waking up, pulling the latest update before I leave the house, flash it while driving, then get to work and spend all day figuring out what was fixed since yesterday. Once data is fixed I won't have to flash back to liberty every night to use my wireless internet at home (tomorrow maybe???).
