between pcolor & imascn which of them better for correlation plot

I have a big problem

i used to differennt function pcolor & imascn for showing corrrelation map but i see different plots what's problem because the data are same

i put my code

subplot(1,2,1)

imagescn(lons1,lats1,rs1)

cb1 = colorbar;

ylabel(cb1,'zero-phase correlation')

caxis([-1 1])

cmocean('balance','pivot',0)

subplot(1,2,2)

pcolor(lons1,lats1,rs1');

shading interp;

hold on;

lakes = readgeotable("worldlakes.shp");

geoshow(lakes,"FaceColor","blue")

rivers = readgeotable("worldrivers.shp");

geoshow(rivers,"Color","blue")

cb1 = colorbar;

ylabel(cb1,'zero-phase correlation')

caxis([-1 1])