The strat-o-matic reference was due to them having a system for their PC game, that essentially does all the calculations based on the season the person has + ballpark they were in.. The original game was to re-play seasons, and had no purpose for advanced stats, as the entire season would've been on equal playing field with each other. Their online version has been up for a while now, and I believe it does incorporate an advanced stats type of calculation. I feel Strat-o does a MUCH better job than Whatifsports when it comes to fielding, arm strength and speed statistics.
Before, when I played, there were no such thing as advanced stats in Whatif (if there was, they were hidden in their equations), so I'm getting used to the idea and I'm not sure I quite like it... It seems made up, based on their own calculations, and I'm not sure I can agree that certain guys like Buck Freeman would have low # of errors and nearly .400 avg, had he played in a different era. The guy was an astrocious fielder, and sub-optimal hitter for his era... Playing the percentages and getting a guy like him to lead the league in BA, HR, 3B, 2B and RBI is absolutely silly to me.