Multiple output noise analysis with LT spice
Not having tried this, I can't guarantee it will work... but here is an idea:

Create a behavioral voltage source that acts as a mux between the two nodes, and use a swept parameter to control the mux. Set the output of the mux to be the output node for your noise analyis. Something like this:

BX Vmux 0 V={k*V(out1)+(1-k)*V(out2)}
.noise V(Vmux) V1 dec 12 0.01 1e9
.step param k list 0 1


Let me know if it works!