I think that this is incorrect..........
The 160SR and the Sport SR K12 Micras are one and the same thing, identical 1.6 litre. (early ones were badged '160SR)
The 1.2 80bhp version, which I have, and looks identical to the 160SR/Sport SR, same body kit, wheels and 'sports' pedals, is
the 'Sport+'
I think that you are getting confused with the
March 12SR which was a tuned 1.2 litre K12 for the Japanese domestic market...