For me, my decision on either the 183 or 210 will also be based on what I want to get for my 2nd PAM.
If ur 1st PAM is a Radiomir, will ur 2nd PAM be a Luminor?
If yes, then u need to think about will this Luminor be a base? marina? chronograph? etc.?
If it will be a base, then u should get the 183 since it has a seconds hand. I wouldn't want to get 2 PAM's and both being bases with no secs hand. Mix it up and get one with secs and one without.
You can't go wrong with either 210 or 183, but I would base my decision on what u want to get for ur 2nd Panerai.
If you want to get a base someday, u need to ask urself, do I prefer a Luminor base or a Radiomir base?
Cheers,
Anthony