Assuming all other things being equal would you take row 1 or row 4 on an A320 knowing that an A320 could easily be downgraded to an A319 and row 4 suddenly becomes a non-F seat?

I'm torn as I've got an upcoming flight that I'm currently in row 4 on but am a little nervous about the possibility of an equipment downgrade.

Delta shows not recent history of downgrading to an A319 on this flight but this still makes me nervous.