There is a clip out there where Danielle Gardner is flexing her pecs while Annie Rivieccio is squeezing them together. Annie is using all the strength of her huge arms and strong pecs, but Danielle just flexes and moves Annie’s arms outward at least 5 inches seemingly easily multiple times. It looked as easy to her as if she were simply doing a pec bounce.
And the biggest difference between them is Gergana can pec bounce, Layla (as of yet) has not.