@xmbw4 you are correct but if you want to get down into the weeds, technically a little bit off.
your "XLR’s" turn into RCA’s by default because only 2 of the 3 conductors in the cable are being used.
I know what you mean, but actually the XLRs are being used as single ended connectors, like most RCAs are. However, if the shell of the RCA is floating, RCAs can be used for balanced connections without a ground just like XLRs can be used that way. Maybe not common, but one example is a phono preamp with RCA inputs that are balanced.
XLR’s don’t have gain
That is correct, but if your amp amp offers both XLR and RCA inputs, and the XLR are truly balanced, the amp will have higher output using the XLR input. If you have higher output using the XLR connections, your system effectively has higher gain.
That said, the title of this thread is a bit misleading. the OP has a new integrated that has XLR connections and seems to be attributing all the changes to the cables.

