Michael, nope, just the magazine difference. Both have a 16.1 inch barrel with a 1:10 twist ratio and a 5/8×24 thread pattern. Both have a two stage ruger elite 452 trigger with a 4.5 pound trigger pull and ruger 2-Port boomer muzzle brake. They both also include the Magpul Moe sl stock and Moe grip and a 15 inch mlok handguard. So no difference other than magazine capacity. If you're not in a magazine capacity restricted state I'd grab Model 5610 with the 20 round magazine since they're identical and Model 5610 is roughly $100 cheaper. Hope this helps and you're very welcome.

Hi Michael and welcome to the forum. The core firearms are identical. Magazine capacity is the "only" difference. Everything else is the same. Cheers and stay safe!