So if both drives use 512-byte logical sectors, there shouldn't be any confusion about the sector size, but just make sure on your dd command that your bs/ibs/obs/cbs field (s) are all multiples of ...
I came across this command online and wonder if it would work with NTFS partitions. It does a byte for byte copy starting at the MBR, so logically it should work. This would be great for doing exact ...