This is duplicate to 626028, but that was reported for VS2010 and closed as not reproducible. I always know that VS crashes after Schema Comparison. But I didn't know the pattern After reading vonEssen's 626028 I can reproduce it more consistently. The trigger to crash VS after schema comparison is Ctrl+C/Ctrl+V.
I'm afraid thet the bug is dependent on something else in Visual Studio because it does not happen always. But after every schema compare the Visual Studio finally crashes sooner or later.