Muscular growth would likely occur for the first few days after your last workout. The big thing is glycogen repletion. Sometimes your muscles will be fairly depleted until a few days into SD when suddenly they appear to swell up. I've had that happen once.
As for me, it varies. I make sure to get a decent amount of protein, but I usually don't count calories too carefully during SD. Sometimes I keep packing in the food like I'm bulking, sometimes I eat roughly around maintenance.