The "significant" difference is that the approximate value is still divided by 2 without the remainder while the odd numbers are not the same.
But there are many facts to recommend in relation to the buildings constructed by these numbers.
Even numbers with an additional operator form a flexible group with a neutral object, while odd numbers do not.
To give the multiplier operator, while both odd and odd numbers form half of the variable group, the neutral object is only available in the half group with odd numbers.