I'm asking, because I'm out of IGPSP310 samples, saw samples of Tecco Smooth Pearl and to my eye it seems to be similar to Production Semiglossy 300, but didn't have opportunity to measure all of them
Production Semiglossy 300 is in Tecco's offer for quite a long period of time, I'm using it as a substitute to unmatched and lamented Canon Photo Glacier 300.
Never saw Production Semiglossy 200, but Semiglossy 190 is completely different than Semiglossy 300.