that is thinking a = b and b = c means a = c.
It's not because a= d and b = c. they're close but not the same. Rageblade gives Jax what is no less than STUPID amounts of stats for him to kill with. It's the reason why Riot nerfed the cost and will probably nerf it a little again next patch. math says that the total value of the stats of Rageblade at max stacks is worth twice the gold of the item. Twice.
it's the most cost efficient in the game. Now Yasuo's passive makes it so that all crit is twice as efficient on him, but that's only until he hits 100% crit. After that, every ounce of crit has literally 0 efficiency. it's filling a full cup and does absolutely nothing. Yasuo's kit "WAS" also balanced around his passive while Jax was not balanced for it and rageblade was not balanced for him.
Right here we see two instances of situations of items having twice their worth, but rageblade displays full value at every stage of the game for every champion. Yasuo's passive displays full value until his crit is maxed, and then is worthless the rest of the game.
So really, like i said, these situations may look similar, but in fact they're not even close.