on what basis? ???

i didn't try the 7version can u tell me something about 7 version? what kind of updater has? like avast , incremental?

yes it is incremental…
the program updater downloads only the file(s) iv_OS.exe and ii_OS.exe (for both Vet and Ino engines, less than 1 MB in size).
or you can download the full updater (more than 3 MB in size).