What is common and different between combinative and mutational variability?

Combinational variation results from different combinations of the alleles of the genes of the mother and father.

Mutational variability occurs due to mutations, i.e. spontaneous and undirected, unpredictable.

These mutations have common features: they are both inherited (if the mutation affects germ cells) and affect the genotype, resulting in new traits.

The differences are that in the first case, the variability is associated with a combination of genes, and in the second, with a change in their structure, as well as the structure of chromosomes or the genome as a whole.