Size of .ISO file

Recently I updated four PC's with Windows XP SP3.

Two are running language NL and two are running language EN-US.
I used the from MicroSoft downloaded .EXE files without any problem.

WindowsXP-KB93629-SP3-x86-NLD.exe size 313.157KB for the PC's using
Dutch and WindowsXP-KB93629-SP3-x86-ENU.exe size 324.030KB for the two
PC's using English.

The size of the two language different files is quite close.

Later I downloaded the .ISO files to create NL and EN SP3 CD's.
xpsp3_5512.080413-2113_nl_x86fre_spdcd.iso size 377.870KB and
xpsp3_5512.080413-2113_usa_x86fre_spdcd.iso size 557.932KB

I wonder, why the big size difference between the ISO's???

Eric P. wrote:
> Recently I updated four PC's with Windows XP SP3.
>
> Two are running language NL and two are running language EN-US.
> I used the from MicroSoft downloaded .EXE files without any problem.
>
> WindowsXP-KB93629-SP3-x86-NLD.exe size 313.157KB for the PC's using
> Dutch and WindowsXP-KB93629-SP3-x86-ENU.exe size 324.030KB for the two
> PC's using English.
>
> The size of the two language different files is quite close.
>
> Later I downloaded the .ISO files to create NL and EN SP3 CD's.
> xpsp3_5512.080413-2113_nl_x86fre_spdcd.iso size 377.870KB and
> xpsp3_5512.080413-2113_usa_x86fre_spdcd.iso size 557.932KB
>
> I wonder, why the big size difference between the ISO's???

I'll reply to my own question

Created the SP3 CD's in Dutch and English.
Compared the NL SP3 CD and the EN-US SP3 CD
On the Dutch CD the SUPPORT folder is only 13MB in size while the
English CD contains a SUPPORT folder of 180MB.