As [MENTION=338271]tangerineowl[/MENTION] said, it is likely going to be the stack and reach that you need to look at to simply get your position to what it is on your other bikes.

If your seat height to the crank is pretty much the same as your other bikes and they don't have a big difference in seat tube angle, then you probably can eyeball it and use a tape measure to compare between bikes.

The other bikes you say are comfortable have drop bars too?