I can't help myself - I did say I'm not wasting my life getting back into this, but it really does worry me that very experienced pilots like you Paco, still haven't gripped a fundamental phenomena like VRS or PS or SWP.
Watch and learn!
VRS is an AERODYNAMIC EVENT - it's all to do with bernoulli and air flow.
swp is an ENGINE PERFORMANCE EVENT - it's all to do with horse power and AUM.
and neither the twain shall meet (except in la la land in america
).
Please will anyone who can't or hasn't grasped this very basic phenomena (VRS/SWP) go find time to research it properly and learn to UNDERSTAND it before it bites you hard in the damn ASS FFS.