I'm more impressed with kyokushin hands (makiwara) and muay Thai shins (banana tree). I think the staple low kick, a side teep, a knee, a clinch, those staples are hard to beat because they are basic.
All over though you have a high roundhouse, axe kick, wheel kick, spin back kick, snap kick, side kick which are superior.
However the axe kick, roundhouse and the side kick are negligible. The side teep is just as useful. Beaten on knees and low roundhouse kicks, albeit again negligible, the legs you stand on are switching stances and spinning kicks. Thais throw wheel kicks.
A spin back kick is the only kick harder than a knee from the clinch. A single technique doesn't make an art.
I love kyokushin. But between the two, muay Thai has it.
It's focus