I am a frequent flyer in FC in both 757 and the 732.

The seats on 732 are excellent. 2B and 2C are always occupied by Air Marshalls on my flights; when I have been able to get them, no complaints. 1C is my backup (will be flying 1C on Monday) with decent leg room. 1D is decent. 1B and (especially) 1A have much less leg room. If I got assigned 1A, I would opt for 10C or 10D instead. 2A and 2D are both fine.

The seats on 757 are exact same width (20.75) and same pitch (38" though some can be 37") as on 732. Main advantages are quiet during boarding since coach pax do not transit, no coach pax using fwd lavs so quieter then too. Main disadvantage is trying to disembark. I wish DL would follow other carriers in holding back coach pax until first class can disembark.

Hope this helps.

Marc