The DUX MMO mouse is actually baller tier. Like holy shit you can control 2 different computers at once, have 2 scroll wheels and 19 buttons. How could you not want this mouse?
Please note that the difference between "Logitech G502 Proteus Spectrum" & "Logitech G502 Proteus Core" is that the former has a tunable RGB light (the big G where the palm rests), while the later has that RGB fixed in blue.