The Fanaroff–Riley radio galaxies exhibit the most extensive radio emissions derived from the active nuclei of galaxies. They morphologically differ from the highly compact and bright radio galaxies observed as gigahertz peaked spectrum and compact steep spectrum sources. Their emissions include jets, lobes, and a central core component, which may expand to larger scales in the future. We study the cores of extended radio galaxies by comparing samples of core-dominated and core-poor populations from FRI radio galaxies. Matching them in redshift, stellar mass, and total radio luminosity, we found no statistically significant differences between the two samples. However, core-dominated FRIs exhibit slightly higher [O III] luminosity compared to core-poor FRIs. Additionally, the hosts of core-dominated FRIs demonstrate slightly higher surface mass density and lower specific star formation rate. The p-values for the observed differences fall within the marginal range (p ≲ 0.1), suggesting that the differences may be meaningful and warrant further consideration, although they do not meet the conventional significance threshold (p < 0.05). We also discuss the possible influences of obscuration, recycling activity, and relativistic beaming that may cause uncertainties and compare the results with those of Mazoochi et al. for FRII radio galaxies.