I have switched out my BF2 with both the OG and 64 cards with the Homage when I first got it. My impression is that they're both good for different reasons.
My experience with the Homage is that it can come across as bright depending on the source. It's not harsh, but depending on the headphones and the EQ, it will really shine those treble regions. The OG generally has a warmer tonality at the cost of resolution and staging to my ears. When combined with a brighter amp like the Homage, it had good levels of synergy IMO.
The 2/64 card is more neutral than the OG (hence a bit brighter). It has a lot more resolution and staging, which the Homage really brings out. It was quite amazing to go back to the 2/64 after the OG, because the Homage's holographic sound is just really noticeable with the 2/64. However, I had to tone down some of the 6-9k regions on a couple headphones with it, because it was a bit much. Of course, that could simply be because I targeted my EQ originally for the OG card and haven't bothered to redo them yet.
Overall, I enjoy the 2/64 slightly more, but I still feel the OG is as good of a natural pairing with the Homage.