Yes, they both had extensive work done - you can tell. Bea looked younger in the GG than she did ten years earlier. Same with Rue.
On Bea you can see she has a crooked mouth (which was a sign of plastic surgery back in the 80s when it was still new). Today, she'd be talking with a frozen mouth (think Joan Rivers, Cher). Bea also has one chin - in Maude she had a double chin.
On Rue you can see she had her eyes lifted back then, as well as her cheeks. She almost has the 'marionette' look - again, a tell-tale sign from the 80s plastic surgeons.
I think the 'lines around the mouth' is actually from cigarette smoking.