People usually look better with a slightly warmer WB setting, as the one in 2nd pic. (There is no way of 'none', btw.) It's not about preference, it's about what looks appropriate since it's reportage / event photography here. Unless you want to sell prints to the participants...
the second pic is brighter compared to the 1st one. for manual wb, it's up to your own preference to create that warm tone especially on the facial or surrounding colours.
ya i think i can spot the difference, though it's quite small.
I looked at the walls and door, like sama-sama.
The red shirt is of a different 'intensity' in both photos.
But the difference is very subtle, to be honest.