The sunrise frame is " slightly slimmer" but the okna is built better as i sold both okna and sunrise, When the Okna is installed, it is not the least bit bulky. The okna will have better performance numbers and a stronger frame with a stronger sill design.
You should really view the Okna 800 " EnviroStar", its one of the nicest windows in the industry.

Actually the frame width on those two is identical depending on the method of measurement.

If you look at it on the tape measure, they look the same. I used a micrometer one time and I think the Verde was about 1/16" narrower per side.

I would give the definite nod to the 500 in terms of performance. Tighter air numbers, better DP without reinforcement, and better thermal numbers.