Clomid VS Letrozole

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Hi, had my first round of <a href="https://glowing.com/glow-fertility-program">IUI</a> with Clomid 50mg which failed unfortunately. My doctor is switching me to Letrozole 5mg for this cycle. Is this better? What are the pros of Letrozole? Anyone had success by switching ?

Honestly my brain gets so foggy in the doctors office and I forget to ask these questions.. should’ve asked her why we are doing this but I thought about it after I got home so hoping my Glow support system has some answers