There's a shadow of a doubt in that. The magnets, the diaphragm, the configuration, the over all tech around the driver are all the same. They discontinued the EL-8 because they had trouble with hardware failure, but it would be poor business decision to let the technology go to waste. The drivers in Mobius are identical (literally the same) but it's been re-spec'd slightly to have a lesser extension probably to address the issues they had with EL-8 and to adapt to the internal amplification/DAC and the new enclosure. It wouldn't be in their best interest to publicly say its a direct port of the EL-8 driver considering its history. Legally, they can claim it's new since it has been adapted for the Mobius.
I'm looking forward to mine as well. Going to be receiving my pair in a week and a half!