I have a image of Inuyasha http://redump.org/disc/18746/
with same ID "SLPS-003374 and date 2001-10-20 but with different size

psxt001z by Dremora, v0.21 beta 1

File: Inuyasha (Japan) [SLPS-03374].bin
Size (bytes):   675757824 (OK)
Size (sectors): 287312 (OK)
EDC in Form 2 sectors: YES
ID: SLPS-03374
Date: 2001-10-20
System area: Jap EDC

can someone tell me if the image in my possession is a fake or a different version of the game?

What is the serial on the disc?
If serial is SLPS-03361, it's a Shokai Genteiban(Limited Edition).
Otherwise it's the different version.

From dump log:

File: Track 01.bin
Size (bytes):  675948336 (OK)
Size (sectors): 287393 (OK)
EDC in Form 2 sectors: YES
ID: SLPS-03374
Date: 2001-10-20
System area: Jap EDC