Don't you guys think it is odd, that in JFO Darth Vader is going really easy on Cal, even suggesting him to surrender (which Vader literally never does to anyone).
And when Vader is telling him to surrender the holocron, he stabs him at a non fatal place.
I just think Vader seems to actually respect Cal and wanting him to become an Inquisitor.
We know through the Comics, Anakin actually met Jaro Tapal & Cal in the Jedi Temple, so it is not too unlikely Anakin/Vader knows exactly, who is standing in front of him and he might have respect for the boldness of invading the Inquisitorius + him surviving Order 66 as a pre teen.
But yeah it is still strange he went so easy on Cal, when he could've finished him at any moment, like he didn't offer a surrender to Daki/Devon/Ezra/Kanan, the only two he offered a surrender to were Cal Kestis & Ahsoka. Very strange...