Here is a cool article about a guitar amps power supply focusing on the rectifier tube. The article explains what the power supply does and how the rectifier tube affects the overall DC voltage. This in turn will affect the feel of your amp and the dynamics. It is a good read and is pretty easy to understand.
I always use different rectifier tubes (especially in amps with the power over 20 watts) to fine tune the feel and to a certain extent the volume of an amp. It’s easy and safe to experiment with rectifier tubes. Let the tweaking begin!!!
