Yamaha M108-N vs M108 ?

[hero99]

Hi,

I'm planning to buy a used Yamaha piano, M108-N (year 1991). Recently I noticed that the there is also a model M108 (without N) and the year is the same. Does anybody know what is the difference btw those two models?

I assume that both pianos have anyway been made in Japan.  They seems to be similar to B1 (made in Indonesia) that Yamaha is selling at the moment, right ? My understanding is that quality of piano's made in Japan are higher compared to ones made in e.g. Indonesia. Am I on correct track? 

Any other comments related to this/these models are also more than welcome!

Thanks!