I read that article one time and remember it well, though the weblink is now a dead one.
Krylon's Dark Ford Blue is probably the best out of those three that are mentioned in the article... Don't believe everything you read.
All the rattle cans have been tried, and Plastikote 224 still comes out on top, Not just for the color, but it wears like iron. I wouldn't trust the Krylon anymore either as Valspar has now changed the formula for all of their Krylon spray bombs and are no longer laquer based as they used to be.
For a rattle can, Plastikote 224 is still the best that you can get. Otherwise, You'd have to mix it up in a spray gun and shoot it yourself.
Still, The color of Ford Corporate blue over the years looking at original cars can be a shade lighter or a shade darker even on original cars. The color was not 100% consistant over the years between plants. That is why the Plastikote 224 is the most used. It tends to be a shade on the darker side, but still fully acceptable...even by the MCA.
It's your best bet. Like I said, Unless you're mixing it yourself, You're not like to get much better. If there was a better rattle can out there, It would be well known by now most likely as 224.