Deculpe e Com Licenca
O que diferentes sao?

Question

Answer

Desculpe-me I'm sorry.
com licença= Excuse me.

Answer

In english, when you dont understand what someone says, you say: "What?!" or, "Sorry?!" or "excuse me"
In portuguese it doesnt happen.

DESCULPE - you use it when you want apologize yourself     >>   I'm sorry;
COM LICENÇA - It's like >> Excuse me..

For exemple: Excuse me, I want to walk in.

Answer

Desculpe - is more like "sorry" 
Com licença - is for when you want to go through and somebody is in your way, or when two people are talking and you have to interrupt...