1080pA vs. 720pN

It is significantly less compressed. It's because 1080P mode has 2x the bandwidth (1080/24pA with pulldown removed is 80mbps, vs. 720/24pN which is 40mbps). There's about 20% more detail, but 100% more bandwidth, so it's a lot more mildly compressed.

Note, this is only really relevant for an HVX/HPX series camera. On an HPX3000/HPX3700, where it's capable of delivering the full 1920x1080 of detail, then 720p and 1080p would show comparable compression.
 
Not just "theoretically", but actually in reality yes. The exact same imaging process is occurring; the only thing that changes is the recording codec. But yes the motion is EXACTLY the same.
 
Sorry for all these novice questions but, was DVCPROHD originated before there was alot of legitimate 1080p recording? I mean, for what reason does the camera split up it's 1080 progressive images into fields? Does this help the images fit into a smaller bitrate?
 
Than why does the HVX take an image that' already progressive, and then downgrade it like that. Into fields. Interlaced is so archaic and messy
 
Because the 1080 codec is interlaced-only, and it's a SMPTE standard, and it's the broadcast standard.

Everyone would love a full 1080/60P but that just doesn't exist, not in recording or broadcast. There's no specifications for it, no standards for it. So it's either slow frame rate 1080p, or fast-refresh-rate 1080i. If you want progressive and fast refresh rate, that's what 720/60p is for.
 
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