The Wollensak 135 was my first 4x5 enlarging lens and I quickly replaced it with a Componon-S 150. The Componon-S has better contrast (higher contrast, cleaner blacks) at all f/stops. The Componon-S has better edge sharpness at wide f/stops. At 11x14 prints and using mid to small f/stops (F/11) you will see a small improvement with the Componon-S. At larger (20x24) prints and/or at wide f/stops (f/5.6) you will see a big improvement with the Componon-S.

Hope that helps,