Hi, I am a professional FPGA designer. I used to be a board designer many years ago, and most of the time I used the tools from Mentor Graphics. Only when I worked for a startup I used Orcad who, compared to Mentor Graphics, was really in another (much lower) league. The differences between Mentor Graphics and Orcad (15 years ago, when I was still a board designer) were many: Processing speed, integration between schematics entry, constraint management and layout tools, etc.