Dumping PC Games

Install the game and check files using Protection ID tool

Ok, I tried dumping Quake II and EAC reported different pregaps than the ones listed in the DB.  I got 1.74 and the rest were 1.72.  I tried dumping it but it kept giving me errors so I skipped it.  Then I tried Unreal which is a single track.  Now this is weird.  It came out as a different file.  My file was slightly smaller than the one in the DB.  I didn't get any errors and my copy is scratch free.  I got this game waaay back when it launched.  Anyone knows what may be wrong?  I used Isobuster for data track.

Well, for Unreal there is only 1 USA version but I checked the Europe ones just to make sure and my copy still doesn't match any of them.  I get CRC 278127a8.  Filesize is 531210960.  Barcode 7 42725 60369 1.  I dumped the track 3 times.  I'll try to dump it from my HDDVD drive now.

I update other info on Unreal, ring, serial number etc.
I didn't put any version because when installed I checked log, console, about screens, etc and I didn't find any related to the version number. However, the log show this
Log: Log file open, 08/14/08 21:03:20
Init: Compiled: Jun 27 1998 06:24:08
Init: Command line:

The file Core.dll located on C:\Unreal\System has the same date, I supposed that on early releases, the developers named the version of the game using the date/time of compilation of the main dll (unreal engine). On posterior version they used number, like in the final official patch.

EDIT..
This are the scan of my disc
Jewel Case - Back
Jewel Case - Right Inlay
Disc
Left inlay and front cover differ from the ones on mobygames.
The front one on the site say "Actual gameplay screen (2 of 4)"
Mine says "Actual gameplay screen (1 of 4)" and it's a different image.
Also if you check close their disc image say at the bottom in the center 04-12527CD1, mine says 04-12527CD2, same in the ring enclosed on parenthesis, but the image it's the same.

I think nothing is wrong, just two different releases for US. Nothing uncommon on this industry. and yes the images are the same, except for the ring code I posted before.