Originally Posted by
Lefly
It changes when you fly LHG non star-alliance airlines: SEN have priority boarding and lounge access when flying EN, *G do not. Also, if I am not mistaken, SEN have more seat options to choose in advance compared to *G
And FB Golds and Plats have more seat options to choose from compared to other STE+. Again, par for the course.
You are right that SEN have advantages when flying non-*A M&M airlines, but that's not good enough to make SEN status markedly better than other *G.