Agreed with others that it would be no definite answer. Experiments make our audio system perfect. With your decent audio gears, you should hear some sonic differences by switching RCA and XLR connections. The reasons behind are due to a bit more output and differences(lower, I guess) in impedance of XLR connections.
IMHO, if you want to unleash the full potentials of your vinyls, put your phono amp closer to TT and use a pair of decent phono cable(shorter & with lower capacitance the better)in order to prevent excessive signal loss or "twists" at the very beginning. You may hear a lot more sonic improvements if you could run a short "TRUE" DIN-XLR balanced phono cable from TT to phono amp.
IMHO, if you want to unleash the full potentials of your vinyls, put your phono amp closer to TT and use a pair of decent phono cable(shorter & with lower capacitance the better)in order to prevent excessive signal loss or "twists" at the very beginning. You may hear a lot more sonic improvements if you could run a short "TRUE" DIN-XLR balanced phono cable from TT to phono amp.