I wouldn't go out of my way just to fly F if I could get otherwise get 64A/K on my flights. Having said that, if I had e.g. work meetings on Monday, I'd prefer to arrive on the AUH flight and have a couple of hours of sleep in a hotel bed rather than arriving on a red-eye in the morning.
Also, this depends on your exact destination, but the drive from AUH to DXB will be just a bit over one hour if you arrive around midnight. I did that a few days ago (was in Dubai and had to get to Madrid - EY flight timings worked better from me than EK from DXB) and it took me exactly 1h05 to get from DIFC to AUH.