The type of resistors will have a small affect on the power coming in. The mute/stby resistors don't do anything. It's the ones in the KMR section that can differ. For example Dale RN lean 2HD and PRP lean 3HD, so it may change the sound a little. Takman will be specifically trying induce some noise, but it won't be much at such low voltages.
Probably the easiest way to really change the sound... swap in MUR860 diodes. They really can give you a tube sound, like the lush type sound. They are not as accurate or as dynamic, but they might be exactly what some people want.