Intro: Dexamethasone, a corticosteroid, was recently demonstrated to be the only medication capable of reducing mortality in severe COVID disease in the UK's Recovery Trial. There is a need to compare different steroids because it is well recognised that different corticosteroids have varied pharmacodynamic properties. The aim of our study was to compare outcomes in severe or critical COVID-19 when treated with Dexamethasone versus Methyl prednisolone. Methods: We conducted a retrospective quasi-experimental, non-randomized study to determine whether intravenous or oral dexamethasone reduces mortality compared with intravenous methylprednisolone in patients with severe or critical COVID-19.The study was conducted on all patients aged 18 and over admitted at a 700‐bedded academic medical center.The primary outcome was the mortality. The secondary outcome included length of stay. Findings: A total of 706 hospitalized patients with moderate to severe COVID- 19 were included in the study. There were n=217 patients in Dexamethasone group, n= 393 patients in Methylprednisolone group and n=96 patients who did not receive steroids.Among the baseline characteristics between the groups, there was no significant difference in median age (55 years in dexamethsone group vs 57 years in methyl prednisolone group p=0.09). There was male predominance in methylprednisolone group (74% versus 54% p