Linux Windows writes to NTFS mobile disks

A 1G mobile disk (2.5 inch), which is formatted as a file system in NTFS format.
First hanging on the Windows 7 machine, copied into the 50G file, mainly MKV packaged movies and corresponding subtitle files. The start of the cuff is fast, about 70m/seconds, but soon drops to 32m/seconds or so. Unplug the copy once it is finished, and move the disk hot.
Later hanging to Ubuntu (version 14.04), also copy 50G video files, the first speed in 30m/seconds, very stable. After copying the disk immediately, moving the disk is not hot, even not warm.
The two machines are configured differently, Windows 7 is higher, and the difference is large. If you want to compare speed, preferably on the same machine, the file system can not be Windows native, that is, to find the two systems are fair file system. For the time being, I do not know if there are any such systems. So the speed difference here is not compared.
I have no research on the hardware, just know that the Windows write file is sequential, and Linux is written in a discrete way. This is the mobile disk that was written in Windows 7. If Linux is also written in a discrete way to NTFS-formatted hard disks, it is logically hotter to write to Linux and then to write to Windows 7. And with the reduction of space, the fever will be stronger. Of course, this is just reasoning, I did not do actual verification.

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