An experimental study was performed to investigate the effects of the burner geometry on the heat released and on the structure of multi-fuel-jet inverse diffusion flames (MIDF). Two different burner configurations were compared at different equivalence ratios and jet velocities using direct visualization and OH* chemiluminescence. Two downward burner were used, with H2 and O2 as fuel and oxidizer, respectively. A post-processing of the OH* chemiluminescence data was carried out with the Abel deconvolution through Matlab®. OH* emission intensities show a dependency on the burner geometry, as well as flame structure characteristics.