Tinea capitis and scalp psoriasis are quite different. Firstly, looking at the causes of the diseases, tinea capitis is caused by fungal infections. The cause of psoriasis is not very clear, but it is considered to be related to multiple factors such as genetics, immunity, and infections. Secondly, the symptoms of scalp psoriasis vary depending on the type and may include scaly erythema, pustules, and desquamation, whereas tinea capitis typically presents with symptoms such as hair breakage, itching, and scabbing.