Hi all, I have a black and green Lamy Safari. The black one is a medium nib, the green one a lefthanded nib.

The green one writes like a dream. The black one writes...nicely I guess, it does feel a bit scratchy sometimes. It isn't as smooth as the green one and writes a bit finer.

I am thinking about replacing the M-nib on the black Safari to a lefthanded nib. Would that be wise move? I did read that some think the lefthanded nib is just marketingspeak by Lamy and that there is no difference to a medium one. Would a change to just another medium nib better?

What would you suggest?