> in what way is it improved?
1) Twice the output voltage.
Perhaps not needed (or wanted) by all,
but allows me to get the final output I
want without adding a stage.
Besides which extra ' headroom ' is
always an enhancement.
2) Better quality capacitors.
The small size of the stock capacitors
decludes use of audiophile quality
3) Note I did say ' somewhat ' improved.
Not night vs. day, but clear day vs hazy.
Easy to try for oneself to see if applicable.
I suggest an outboard pot to help trim levels.
I use one of these: