The i-Genius is NOT the same hardware as the genius smart. The difference is that the i-Genius has an older ant+ chip with less channels. This is very unfortunate, as generally speaking the iGenius is the best trainer in the range (just below the new neo smart). Because of the lack of ant+ channels the igenius cannot be upgraded to a genius smart just using software. It is simply missing the additional ant+ channel for the fe-c control.
Tacx had announced a factory upgrade for the igenius but I don’t know if this is actually happening.
Please take a look here.
BTW. The vortex smart and bushido smart usually need a firmware upgrade too before they support FE-C. This can only be done using a RECENT iphone or ipad, as it needs a recent ios version and bluetooth smart support in the phone/tablet. This is really annoying stuff. A very good idea by tacx supporting a open protocol but such bad information policy and complicated upgrade process.
I assume the genius smart and neo smart will come with fe-c support directly from the factory as they have been released AFTER tacx had announced fe-c support for all smart trainers. But I am curious too if the genius smart will do a good job with zwift. Considering to buy one as it has a really interesting price point for a training with such a wide resistance range.
BTW I am currently using a vortex smart which is working abolutely seamlessly with zwift. Very good support of this piece of hardware.