It's a bit like that Mata v Silva comparison 3/4 years ago, one has the better output while the other is unquestionably the better player
I'd say Hazard for me though it annoys me he doesn't want to take his ability to the next level
Hard to argue with this I think. To compare the two on the very limited definition of "productivity" alone is silly in my view. If people want to use stats to aid their judgment then why not look at all of them? Hazard has consistently created more chances, dribbled past more players, used the ball more intelligently and wasted less chances.
The biggest difference between the two is their ability to retain and recycle the ball in the build up. This whole decade, Sanchez has never had a season where his passing accuracy was above 81% - and that was at possession-crazy Barca - while Hazard has never had a season where his passing slipped below that.
Keeping the ball for possession's sake obvious isn't a positive quality in a star attacker, but that's not what we're talking about. Hazard is central to his team's fluid build up with thoughtful passing while Sanchez breaks up so many attacks with careless moves. Part of that is Sanchez just being a more aggressive, risky player, but part of it is from being sloppy and stupid.
That trend repeats itself in pretty much every facet of play - it's not just passing but dribbling, holding the ball up etc. Sanchez loses the ball a lot. I'd put him on par with Rooney in that sense. Constantly breaking up play with the wrong passes, sloppy touches and wayward finishing.
I'd say he's as inconsistent as Rooney too. No idea why people think he has a high bottom level but they're in for a surprise. At Arsenal, Barcelona and Udinese he's went through long barren periods in front of goal and it's pretty clear he's very erratic in the build up. In his best season at Udinese he scored 1 goal in the first 15 games. In his 2nd season at Barca it took him until January to score his 2nd goal of the season. This season he managed 2 goals in his first 10 games.
People will find excuses for each but it seems pretty clear he's a very streaky player with a very low bottom level. People just look past it because he's energetic. If Hazard is lethargic but quietly contributing to the fluid build up play while Sanchez is running around like a maniac losing the ball left, right and centre, Hazard is the one more likely to get criticised. Which says more about people's expectations and preferences than it does about contribution on the pitch, in my view.
When people have to put up with the more frustrating elements of Sanchez's game on a weekly basis I think perspectives will change a lot. It's easy to only focus on the flashy stuff when it's not your player hurting your team with brainless play.