Think the EQ is better at really trashy sites with its super fast recovery speed and think the V3i would be better at hunting for gold jewelry at sites not as trashy. Also, think the V3i is better at telling a nickel from can slaw. For relic hunting, haven't used the EQ800 yet, but from the reviews i am seeing, this might be the better detector because of how deep people are saying it can go.
I think the weight is better proportioned on the V3i, even though it is heavier. Coil on the V3i weighs less than 1 pound and that is the 13" Detech Ultimate coil. The EQ800, most of the weight is in the coil, so not distributed evenly. I do not like the power button being on the side with the EQ800.
The EQ800 seems to be better with it's ID's. I have had issues with the V3i mis-identifying targets occasionally. The pinpointing is better on the v3i, however, I have been getting better with the EQ800 and most cases, dont even need to use the pin pointer option.
For me, think I will keep my V3i and the EQ800 just because of the spectrograph feature on the V3i though, will be selling my Whites DFX in the near future.