I have both. I have had a the F75 camo, now upgraded, since 2009 and a regular one before that. Both the Deus and F75 ltd 2 work great.
Charging the Deus has never been an issue for me. When it is real cold I use ear buds hooked up to the remote stored in my inner pocket with an amplifier, makes things very warn and loud. Still a lot to learn about the Deus.
The Deus is mainly used as 3 tone for a low iron sound, now the F75 has that.
The F75 has coil choices which I have found important in cotton and corn fields.
I have only used the upgraded F75 twice (went back two Fisher twice) but it has greatly impressed me, digging a sword hanger that was vertical in the ground. Being able to final crack the sense up and run smoothly is going to be great!
Just some general opinions that I hope help.
HH
Fred