Hey guys!

I'm planning on making a Paris themed cake in a couple weeks for a friend's birthday, and was looking up templates for the Eiffel tower. I noticed that some people used chocolate to pipe it instead of royal icing. Could someone tell me the different between using the two? It'd be nice to let her eat up the tower at the end, but how is it in terms of consistency/fragility, etc?

Any advice/tips would be greatly appreciated!