From what I can gather on my research that unless you are going to run over a long distance you will not know the difference that being said what is the reason for this and what are the other main differences
Balanced connections are used mainly when there is a very low voltage signal level combined with a long cable in an electronically noisy environment. For example, microphones often use balanced connections. They produce signals well under 10 mV, and recording studies may have other complex electrical signals going on that may interfere with these low level signals. Balanced connections are an easy way to deal with that.
If you are using voltage levels higher than that you probably don't need balanced connections. Typical line level voltages (like analog audio connections from a CD player) are about 100-200 mV. The voltage levels from pre-amp outputs are about 10 times stronger than line level. With those stronger signal levels, it is unlikely that electronic interference will be a problem.
The only items in home hifi with a signal level as low as microphones are the pickup cartridges on turntables. I have never seen balanced connections for turntables. If turntables don't need balanced connections, I've always wondered why people think they need them between a pre-amp and an amp?