I think that there is a difference in the length along this two versions.
I have the clip on model (gsf 400p) imported from Japan , and i have just changed the top yoke and intalled bar.
I mesured the length of my fork and it is (with for fully extended)
82 cm ,32 inch from top bolt to bottom of the fork
20 cm , 7,8 inch from bottom yoke to uper spot of fork tubes
47 cm , 18,5 inch from top bolt to fork tube
If anyone can mesure so we can see if there is any difference.