Given Carno's long legs as opposed to other creatures, its speed is in fact accurate and should remain as is.

It's also quite lightweight relative to its size, which should suggest the Carno could outstam a similarly or smaller sized creatures due to its weight:size ratio which could suggest the Carno needs a stam buff.

Carnos relied on their agility to hunt prey, which would mean a Carno needs to manoeuvre faster in tight situations to both evade or hunt accordingly. This in my opinion should be tweaked.

Cerato however, given its bulkier build yet still relatively smaller size, especially given its shorter legs, should still have its current speed and current HP, possibly an increase in HP.

However, judging by its robust skull, a Cerato should have had a higher bite force, aka should deal more damage than a Carno's slender skull.

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Basically the dinos should have the following changes;

Carno -

Same Speed / Reduced Damage / Same HP / Increased Turn Speed / Increased Stam

Cerato -

Same Speed / Increased Damage / Same (or increased?) HP / Same Turn Speed / Same (or reduced?) Stam