Looks nice.
I am just starting to learn color grading as well.
Are you using only LUTs or do you manually color grade?
I would look at a plug in called final color.
Kevin Shaw | Colour Grading | Colorist
Even if you dont use it per se, the tutorials in his website are amazing. He's a colorist for film and he walks you through the process. I agree that the top frame looks better and more natural. Leave over saturation for the demo mode for tvs at Best Buy.
Both. If you sign up (email) he'll send you a free course. And he's got stuff on YouTube