OP. Most comfort fit frames have about an extra 20 - 30mm of head tube length and sometimes a slightly different length top tube. If you went to get fit for both bikes, it is entirely possible to come out with exactly the same fit on both bikes by using different stem lengths and spacers. In which case both bikes would be very similar in performance.

If you have a short HT race bike with a whole bunch of spacers then you may as well be on a comfort fit frame. You wouldnt look as silly and it would be more appropriate.

Its a bit like getting a comfort fit frame with a longer HT becasue you want a high front end and then putting a 130mm stem on it - you may as well have gotten a larger frame with an even longer HT -You wouldnt look as silly and it would be more appropriate.

Now, a race geometry frame with few spacers and a long stem will result in a fit that can only be achieved by a race geometry frame - you need flexibility to make this work.

A comfort bike with lots of spacers and a shorter stem will provide a position that only a comfort bike can achieve. If you dont have flexibility then you may well make more power like this.

You wont notice much difference between any bike unless you are set up in one of the last two positions where the differences in each bike are maximised and you are comfortable on both. In which case the more stretched out bike with a lower front end may make you more aero and therefore quicker - provided as I mentioned above, you have the flexibility to make it work for you.

Edit: If you can almost touch palms on ground as you say then you probably do have the flexibility to ride a fairly big drop should you wish