Reply to What makes synths different from others?

I know this sounds like a Noob question but I'm just looking for a detailed answer to the question. All synths have Oscillators, filters and Adsr envelopes. In theory a saw wave is a saw wave. All things being equal between some synths, what really makes them unique? Now I know a synth like razor does have some different kinds of oscillators but I'm hoping someone can explain what would separate a saw wave of one synth from the saw wave of another.