Obviously Israel and pre-1994 South Africa are different countries, but the label of apartheid may be justifiably applied in both cases. (Coincidentally, the apartheid system in South Africa came into being in 1948, the same year Israel became a nation.)

Apartheid refers to a social or political system that discriminates against a group of people on the basis of their race and/or ethnicity. In South Africa, the dominant whites discriminated against non-whites. In Israel, the dominant Jews discriminate against non-Jews, especially Palestinians.

Applying "double standard" is discrimination. And when that discrimination is systemic to a society and its government, it's apartheid.