Alright, since noone else will reply I'll give it a shot. I actually own F75se, White's V3i, 2 Deus units, and CTX. For relic hunting Deus #1 in my book. The f75's ergonomics aren't bad, just not as good as Deus. I feel the Deus let's you sweep better. The rod on F75 forces you to get the coil too far away from you, and with long hunts the tiny bit of weight because if of the necessary rod extension will wear on you. The deus rod can be set to exact length for comfort and efficient coil swinging. The Deus is superior to F75/F75LTD/F75se when it comes to EMI. I can't speak for f75LTD-2, never run one. In poorer detecting soil I think the deus is better. The Deus tones are more intelligible than F75 series. The Deus' tone break capabilites are good, F75 series don't possess. The Deus can be operated on 1 of 4 freqs, F75 series you're stuck with 13khhz. Coil size for coil size Deus separates better than F75 series, disclaimer: the F75LTD-2 has a fast audio capability, again I've never used. Deus software can be upgraded via internet, not so with f75 series. Target ID for both units I would rate equal and inferior to CTX. Both units have good back lights for low light/night hunting. Deus is wireless, big advantage when hunting in tree limbs/brush and control head if purchased and taken can be used off of the detector's rod. Deus has filter adjustment, F75 series do not. Deus has recovery setting adjustment, F75series do not. I feel the notch system on Deus is better than F75 series, helps a lot with hunting in modern trash. Deus components have to be charged, F75 series use AA batteries and are very power efficient. The F75 series all metal may be better than Deus. I haven't used AM on either of my Deus units for searching. I'm hearing the Deus is hard to keep tuned.
Warranty for both seem equal, 5 years.
ps I noticed lately on a lot of youtube video, lots of Deus units are being used relic hunting CW sites in VA/TN/NC.
Good luck in your decision. I am strongly considering getting my f75SE upgraded to the LTD-2 version. If anything it will quieten it down and be a detector I can let a friend use or someone interested in getting started in detecting.
I use Deus the most out of all my units.