The Opus is a thinner ski, about 5mm thinner in the waist and closer to 10mm thinner at the tip and tail. Also the Opus is much softer. There turning radius is fairly similar.
The opus would probably be better for everyday use if you like to go edge to edge obviously, but the New life is gunna charge pow better.There both great skis.
The Opus is going to be like a K2 Obsethed or The Moment Bibby Pro.
While the Surface New life would ride more like and improved Icelandic Gypsy or like a Salomon Rocker 2 122 with bigger tip/tail more sidecut.