What are the seat tube angles for each of those bikes? In order to directly compare the effective top tube (ETT) length, they must be the same. If they're not, you have to do some math. Roughly speaking, for every degree that the STA becomes steeper, the ETT becomes ~1 cm longer.

As the seat tube angle changes, the relative relationship between the head tube (handlebars) and the bottom bracket also changes. As the STA becomes steeper (say 74 or 75 degrees), the handlebars get further away from the bottom bracket. As the STA becomes slacker (72 or 73 degrees), the saddle moves away from the bottom bracket and the handlbars move towards it. The triangle rotates, so to speak.

The moral of this long, poorly-explained story is that ETTs aren't absolute numbers, and different geometries work better for different bodies. And then there's that whole personal preference thing....

This would be a great conversation to have with your fitter sometime, as he's fit you before and will have some suggestions for bikes/frames that will fit your particular body best.

Good luck, and happy Thanksgiving!