It is the same exact hardware, it shouldn't be any "better".
I don't believe Herrie needs that firmware, he's doing better than NEC at adding more media support :bigsmile:
Normally OEM firmwares are equal to or not as good as the 'official' firmwares.
But just to be sure, do you already have the TDK rebadged 2500 ?
If so, what is the firmware revision?