Wow! Didn't realize they continued to make the Caprice coupes in the late 80'*.
My dad'* first brand new car when he came to America was a '78 Caprice coupe. He liked the taillights better on the '79 when they came out, so he traded it in. Two tone silver and gray with gray interior, and fully, fully fully loaded. Power seats, mirrors, moonroof, etc. AND....the kicker....it had the wicked looking extended back window! I LOVED how that looked. Totally changed the appearance of the car.
He had it up until '96 I think it was. Still in VERY good shape, except the bottoms of the doors had rusted out, and at that point and time, good look finding replacements. :( He was just as nuts with keeping everything looking new (replaced the grill if there was so much as a scratch on it, newer, bigger Chevy emblems, etc), but this was before the eBay crazy, so he paid full price at the dealer for everything.
Anyway, both your cars look REALLY clean!
Keep them that way, and good luck with them.