The first one is definitely not a JEM. The monkey grip isn't the right size or in the right spot. Looks like a RG JEM clone... It's like one of those guys who converts their '69 fast back mustang into a '69 mach 1 or BOSS 429 lol. But yeah I second the needing better pics comment from 3bolt. Way too blurry... Looks like they were taken in 2005 with a cheap digital camera.
First one is an rg550 neck on a custom body. The body can't be authentic and modified because the volume knob would be closer to the pickups with that serial number. Second is a refinished 1996 rg570 I think. Guessing d/t less than stellar pics.