I would go with the genuine replacements.
Reason is, if the replacement LEDs don't have precisely the same CRI and color temperature as the originals, the colors will come out incorrectly.
Fact is, no white LED is perfect over the whole spectrum, and the manufacturer will have to some extent calibrated the TV to compensate for that.
Word of advice, once you've replaced the LEDs, turn that brightness setting down! On some TVs the LEDs run way too close to maximum ratings at high brightness levels. If you keep the brightness setting below 80%, preferably even lower, you will extend the life of the LEDs dramatically.