Comparison of Okna and Starmark windows

[qgw]

Im curious as to the difference in the Okna windows and the Starmark windows.. Im going with casements, most are RO of 68 x 55. Ive been hell bent against vinyl windows until I heard of Okna, and now I am intrigued.

[canuck]

okna is considered by most pro's to be one of the best windows available. excellent energy efficiency and very well engineered. they use a high grade vinyl.
starmark is also made by okna and is made from a cellular pvc whch is a bit different than standard vinyl and more expensive. think of composite decking specifically azek and thats basically what cellular pvc is.
either of their products will serve you well for years.