I understand the wife factor. I am lucky my wife loves my tanks. My suggestion would be not to rack your brain trying to figure out what the material is, but to possibly paint both to match. It will be much easier to do.
Like Paradoxed has done, you might want to ditch the canopy with the...
I am in the market for a good Calc Reactor of a 180 gal. What is everything I would need? I have heard some setups need additional parts or supplied parts are not efficeint. Any reputable brands...Knop? Korallin?
Tim