you're saying that a HWK, X-Wing, and Advanced are all worth the same assuming the final cost of each is the same.
That's.... fundamental to any scoring system. When you kill the ship then you score however many points it costs. All partial points does is make it a linear sliding scale instead of a sudden cliff.
If you want to know what partial point would do you do NOT need to run a tournament using them but rather just get the added information so the 'what if' situations could then be examined later. If you change the system then other things will change and you will not get an accurate example of what the change in scoring actually does.
I'm running a small tournament this weekend so I may do that. It's a very small sample size and not exactly a Regionals-level caliber event though.