My choice would be Le Mans Blue. But thats not available anymore, sadly.
Of the two mentioned in OP Portimao Blue would be my option. But then I am biased!
One thing that struck me about Portimao is it takes on an almost blue/purple hue in bright sunlight. But in lower light or overcast days it looks more of a vivid blue.
Paired with oyster leather it looks awesome. Only downside is G20 msport isnt available with oyster headlining.......