Try to be clear, when you shoot 24pN there is not more compression but the 100Mbps is based on 60 frames, so the 24pN will actually be 40Mbps but each frame is getting the same bitrate.
So 100Mbps / 60 frames gives you an average of 1.6Mb for each frame, so then 24 frames X 1.6 Mbpf = 40 Mbps.
So the quality of each frame should be the same whether you shoot in 60 or 24 fps.
There is nowheres near the compression of HDV going on.