I asked SCHUBERTH to provide an overview of the changes between the C4 vs C4 Pro
Flashlight size comparison with its competition: Group 1 left to right, small flashlights: Fenix E-Lite, Olight i3t EOS, Fenix E03R v2, Cyansky M2, Olight i2R EoS Group 2 top to bottom: Manker E14 IV, Lumintop FWAA, Fenix E03R v2, Group 3 top to bottom: Fenix E09R, Thorfire TG06, Sofirn SP10 Pro, Fenix E03R v2, Lumintop FWAA Group 4 reflectors left to right: Olight i3t EOS, Fenix E03R v2, Cyansky M2, Olight i2R EOS UI : User interface and driver The driver is anyones guess, and its sealed in so I cant say for sure
No major flaws
If youre planning on longer tour, then you need the Women's Amber 54 EU from Gregory
If you plan to bring travel rods, or 4 piece fly rods rods like I do, you might be might be able to cary them on