Nope, copying software isn't stealing. To steal software, you'd have to either:
- steal a boxed version in a brick-and-mortar store
- steal the actual code from the company and delete their version
Copying doesn't prevent the original author from keeping his own version.
No difference between illegal copying copyrighted works, no matter if it's software, digital music, digital movies, digital books, digital pictures, etc.
As I said in my previous post, the word "stealing" implies "taking something away from their owner". By copying you're not "stealing" anything.
I'm not saying you're not preventing people from getting paid for their work if you make illegal copies (because you are, and they do deserve compensation for their work), just saying the word "stealing" doesn't apply here.