I upgraded the Node N130 with the PD Creative internal PCB, but also bought the PD Creative PSU.
I've now sold this all, and changed streamers. I can't say I observed a rise in the treble, but did notice a significant drop in the noise floor. I also noticed a much more relaxed presentation. I was also using an external DAC by the time I upgraded the Node, but the upgrade was still a significant improvement from the vanilla, factory Node as a Streamer only
Hope this help, good luck 👍