2025:
Ryan - 171 IP, 10.21 K/9, 2.05 bb/9, 3.42 ERA, 3.70 xFIP, 3.1 fWAR
Giolito - 145 IP, 7.51 K/9, 3.48 bb/9, 3.41 ERA, 4.59 xFIP, 2.0 fWAR
Bello - 166.2 IP, 6.70 K/9, 3.19 bb/9, 3.35 ERA, 4.39 xFIP, 1.9 fWAR
If you think Bello is a 3, then Giolito is a 3. Ryan is better than Giolito by almost every metric (k rate, bb rate, whatever).