tested with uif2iso 0.1.7c and magiciso 5.5.0.281:
Code:
Z:\>md5sum I:\270uif2iso.iso I:\270magiciso.iso
\bc978c271e114e54c0530f99a8620962 *I:\\270uif2iso.iso
\bc978c271e114e54c0530f99a8620962 *I:\\270magiciso.iso
so the obtained ISOs are perfectly identical.
can you verifiy if the md5 of your ISO matches too?