widest gamut yes possibly, especially in reds and blue.
I'll need to process the spectrophotometer measurements correction and spectrum first to confirm, but this is an exciting technology and I'm happy to have the exact tools to analyze this.
"Best" display I doubt so, as colors are intense, can be flattering but not accurate.
Contrast ratio measured is 882:1 on this sample, I'll try to measure more devices because I've seen quite a bit of variations as well including a really washed out one: enough to be concerning.
Best display would have accurate a sRGB gamut color palette (or the choice between intense and accurate colors which is perfectly doable) and higher than 1000:1 contrast ratio.
But that's very promising still and a massive step-up for Sony as they simply had the worst mobile displays.