I've seen recent samples of both and to my eyes they are both very beautiful. They seem to look very close to one another, as the enclosed pictures show. Is the difference that one is metallic (Estoril Metallic) and the other (Oslo-the Turbo) is not? Any difference in hue/tone/etc.? TIA.

 

I believe the Oslo has a little bit of gray and green in it. But in real life, these two colors looks nothing alike except they are both called blue.

 

Here are the formulations and percentages of tints for comparison:

OSLO BLUE PORSCHE
0.46 Brilliant Blue
0.28 White
0.19 Black
0.07 Green


ESTORIL
0.46 Fine Silver
0.16 Brilliant Red
0.16 Blue
0.15 Dark Blue
0.05 Black
0.01 Metallic Flake
0.01 White

 

Look for BMW's under Estoril blue, thats how estoril blue looks like in real life.

 

It's difficult to compare the colors with the two pictures you attached. From my experience in painting light blue cars (hot rods) I would suggest the metalic. A light blue looks better with a little metalic IMO. I think the flat blue would be a little to 'candy' looking, but then again I wouldn't paint a turbo light blue so hey, what do I know.