I own both, I prefer the Air over the Pegasus because:
The Air is actual piece recognition, if you put the W King on d1 and the W Queen on e1 it knows you have the wrong pieces on the squares. The Pegasus just knows there is something on the square.
The Air/app integration has been very good, the Pegasus was flaky and not consistent.
I like the board for the Air, more of a solid chess board that the Pegasus.
Those are my thoughts, your mileage may vary.

Hi there,
I am a beginner/intermediate and I wonder which e-board you prefer and why, between the two in subject
Thanks a lot