Based on the reviews, the copper vanilla mech mod is compared better as it hits well vape and is even less expensive as compared to the apollo authentic mech mod. So I suggest to go with the copper vanilla mod.
This discussion would definitely clear your doubt:- https://www.reddit.com/r/vaporents/comments/29irw5/whats_the_possibilities_of_getting_positive_on_a/
Try Innokin ITaste MVP 2.0 - IClear 16 Energy Kit which is one good regulated box mod comes with variable voltage and wattage feature to have amazing vape experience.