Basically it’s self-professed centrists who support “the gays”, NATO, & Ukraine (PS) plus their right-wing Christian conservative allies (OLa’NO) vs nationalist welfare chauvinists who hate Roma people and “George Soros” (Smer-SD) but are NATO-skeptic and want out of Ukraine, plus their right-wing nationalist allies who like Josef Tiso (SNS). Our good Nazis versus their bad Nazis, am I right?
Slovakia is a socially-conservative country in which since the fall of the socialist bloc, the nominal center-left and center-right have both expressed reactionary cultural attitudes. PS is a relatively new party that has been an exception; given that they would govern in coalition with right-wing Christian conservatives and with a socially-conservative center-left in opposition, I doubt their professed stance would do much other than pinkwash NATO. I’m not going to hold my nose and cheer for Smer, although if they actually pull Slovakia out of NATO it would be extremely funny (albeit unlikely — Smer is a party of the establishment and has governed for most of post-2000 without doing this, not some radical populist party as the media paints it).