Axle Nut - castle style replacing staked style?

Hi there. I just replaced the half shaft and wheel bearing on my 2012 Hyundai Accent, and the new axle nut I got was a castle style. The old one was a staked style. Hyundai parts lookup shows a castle nut, so it looks like maybe they changed styles?

So my question is this: being as the axle shaft has indentions for a stake, but no hole for a cotter pin, is proper torque enough to secure the axle nut, or do I need to hunt for a new axle nut? Should I apply red or blue loctite to keep things secured?

Thanks!