If the RS6710 is HDMI 1.4, the bandwidth is restricted to 10Gbps, same as my RS57. It's not the resolution you have to account for, it's the color depth. The JVC can only support 8-bit color at 4:2:0. HDR requires 10-bit color and supports 4:4:4 color space, that is why you cannot have HDR on the JVC. If the projector has eShift then it supports UHD.
If the RS6710 is HDMI 2.0a, then the Integral is not needed (I think only the RS 400/500/600 are HDMI 2.0a compatible).
My RS57 is a step down from your projector and i have no need for the Linker. I can tell you this. The JVC has horrible HDMI handshaking and adding the Integral will slow it down a bit, not much but it does.
If it's not a BIG screen, it's not a theater...