An interesting analysis....

My experiences with the IHG brands,

IC is more similair to a Marriott/Grand Hyatt/Hilton,
There are however exceptions like IC AMS / IC Bordeaux etc...


W is just .... W (there is nothing smiliair in the industry) the only certainty is that you stay there if you like loud, louder, and noise.
And seen and be seen until it becomes clownesk and till tragic/comedy effect.
No IC remotely compares to W (thank heavens)

Interesting that Vignette took over Voco's brand roll as conversion brand, if i understand correctly.

Kimpton's in the EU are indeed nice hotspot hotels without the attitude where one feels comfy in any lifestyle.
I think IHG did well there in brand consistency and experience.

Indigos are comfortable bit quirky hotels
Crowne Plaza is just a business hotelbrand, no confusion there
HIX & HI are simple places for an overnight
staybridge is a handy concept for long stay