Interestingly, contrary to the better in vitro FAP-inhibitory performance of natGa-SB03058 than natGa-FAPI-04, its radioactive equivalent [68Ga]Ga-SB03058 (7.93 ± 1.33 %ID/g) demonstrated a ~1.5 fold lower tumor uptake than that of [68Ga]Ga-FAPI-04 (11.9 ± 2.17 %ID/g). The gene discussed is FAP; the disease is neoplasm.