Thank you for the opportunity to help you with your question!
1. Intangible assets acquired by the business are recognized at fair value under GAAP while it is only recognized under IFRS if the asset has measured reliability of providing future financial benefits.
2. Under GAAP, inventory can be measured either by FIFO or LIFO method while LIFO is not allowed under IFRS
3.Under GAAP, if the inventory has been written down, there is no possibility of reversal while in IFRS, the write down can be reverses under certain constraints.
Please let me know if you need any clarification. I'm always happy to answer your questions.