Tony, I would call AT Pro depth decent but not exceptional.
For instance, I've had multiple F75s and the F75 is definitely deeper but I would take the AT Pro every time because I like the audio so much better.
My cz-3d air tests about 2" deeper stock coil to stock coil, but it also falses a lot on iron and the AT Pro does not. In heavier trash and especially heavier iron, I'll take the AT over the cz every time.
The stock coil air tests about 1"-1.5" deeper than the 5X8, but the 5X8 is much better in iron and trash and ergonomically better too.