The difference is in the flexibility of having a physical separation between preamp stage and power amplification stage.
I do not think you can generalize that one or the other definitely sounds better. If you don't need flexibility and only need an amplified output then the integrated approach will probably be cheaper for similar performance/features.
I do not think you can generalize that one or the other definitely sounds better. If you don't need flexibility and only need an amplified output then the integrated approach will probably be cheaper for similar performance/features.