I remember having a look at the 590 when I bought my 562, at a time I couldn't decide between a luminor and a marina, with the 590 no 3 and no 9 so problem solved, in a way! Enjoy it in good health!
the only thing they have in common is that they are both 44mm Luminors. One is steel and one is Ti, one is sandwich and one is sausage, one has exhibition back and one has a "pig" displayed, one is the iconic 3-6-9-12 and the other has a small second hand...