The key to the disparity is that potentially having skin in the game is what makes a potential investor more analytical and critical than any non-investor. Furthermore, every investor has a different set of criteria. I don't believe that any simulation whether available persons or some software can ever be a viable substitute for reality.

I suggest a simple process, one that I have used in the past:

    Make a list of at least 5, pref 10+ potential investors.
    Rank them in order of how much you would like them to invest.
    Start with the lowest one on the list
        Present and gather feedback
        Refine pitch deck to incorporate feedback
    Repeat with next investor, working up the list, repeat the feedback and refinement process.

Ideally by the time you reach your more ideal investors, your pitch deck is much improved and you increase your chances of a favorable outcome. In fact, you could end up with bidding rounds.