Lebron being 6'8 and 260 is absurd. You're also vastly underestimating Lebron's first step. People play OFF Lebron and he's still able to explode past them whereas people play Kobe tight and he blows past him.
Kobe has better agility in the air but Lebron has better balance, strength, is WAY more durable, has more stamina, has an elite first step too, and all the other things your mentioned.
Kobe has better agility on the floor and acrobatics in the air but again, a Lebron is 265-270. The fact that he's explosive, agile, has the balance and speed that he does is just...mind-boggling.
Kobe is slightly better at the things you expect a dude that's probably 40 lbs lighter and 4 inches shorter to be but the mere fact that Lebron is comparable, at his size) is what makes it absurd because he still all the physical advantages you'd expect a dude who is 6'8 and 260 to have like strength and size but he has freakish jumping ability, speed, quickness, balance, Durability, and even a soft touch.