Loratadine - How does this drug compare to cetirizine?

They both belong to the same drug class "antihistamines" and are very similar.

From Drugs.com:

Cetirizine is an antihistamine that reduces the natural chemical histamine in the body. Histamine can produce symptoms of sneezing, itching, watery eyes, and runny nose. It is used to treat cold or allergy symptoms such as sneezing, itching, watery eyes, or runny nose.

Cetirizine is also used to treat itching and swelling caused by hives.

Cetirizine may also be used for other purposes not listed in this medication guide.

https://www.drugs.com/cetirizine-hcl.html

Loratadine is an antihistamine that reduces the effects of natural chemical histamine in the body. Histamine can produce symptoms of sneezing, itching, watery eyes, and runny nose.

Loratadine is used to treat sneezing, runny nose, watery eyes, hives, skin rash, itching, and other cold or allergy symptoms.

Loratadine is also used to treat skin hives and itching in people with chronic skin reactions.

https://www.drugs.com/loratadine.html