Following the rebranding of Ubuntu all of the major spins sought to realign their visual identity in keeping.
[Note that the K in the lower picture is NOT the final ‘K']
The original Kubuntu logo for comparison: -
Sure, the new ‘style doesn’t stray from the visual footprint of its bigger brother Ubuntu (see below) but it does move Kubuntu, in my eyes at least, towards a persona more befitting of its professional feel.
In comparison to the rest of the pantheon: