Meet Dave ....or is it Steve?

This is one of our Giant African land snails, the other was hanging just above its head. I have just given them a fresh cuttlefish and the noise was incredible, I could hear it over the tellybox! They are a few months old now and are getting very big though have a way to go to be fully grown.
Our last snail Grace was 30cm along the length of her foot (the bit they move on) these are about 10/12cm at the moment. They are pretty much identical though so I couldnt tell you which this is.