How are Logical Positivism and Objectivism alike and different Specifically I want to know how they differ in epistemology?

How are Logical Positivism and Objectivism alike and different Specifically I want to know how they differ in epistemology?
Positivism starts by stating "world (existence) is composed ofatoms" then it goes to state that in order to claim one state ofthe nature is true or false one has to look at atomic arragement,empirically, and that there is no certainty that the samearrangement will automatically render the same state of nature, uhave no a priori guarantee. Objectivism starts by stating thatexistence exists, therefore anything that exists is what it is ifit can be defined independent from other entities (non-necessityprinciple), therefore almost by definition its nature is immutableand not subject to empirical verification.

Although it may look as petty differences it is not, on the onehand positivism concludes that since nothing is granted (not evencausality) u have to look at the world for answers, meanwhileobjectivism concludes that since there are in reality well definedentities (dont matter if they're not atomistic, since it can belogically proved that the principle allows for both aggregate andatomistic entities), causality exists (same cause sameconsecuence).

Positivism would go on saying that objectivism claim is justlabelling exercise, objectivism would refute by saying it is notlabelling because it is grounded on existence: a thing cannot beother than a thing. So positivism would defend the claim that inquamtum physics outcome comes from nowhere (probabilistic),objectivism would claim that outcome comes from already existingentities and that probability assumption is a reflection of lack ofknowledge.

On ethics, positivism would say that since everything needs to beverified ethics per se doesnt exist, all human behaviour pertain tothe sciences. Objectivism would say that ethics work with concepts(abstraction of entities in action), it is possible. This goes downto politics: positivism is apolitical and amoral. Objectivism hasethics and therefore only allows a political system consonant withethics.