RBK752 speeds over 1Gb connection

I have a 1Gb connection and usually get 600Mbps down on my phone and laptop on my current Wifi 6 mesh system, an Arris Max Pro AX11000.  Can potentially save almost $200 by moving to the RBK752 AX4200.  Since speeds on the AX4200 are rated at 4Gbps, I'm thinking I would still see 600Mbps on my wireless devices.  Anyone have any thoughts on real world max speeds on the AX4200?