How is Trump's Iran deal different from Obama's nuclear deal?

The provided article content is incomplete and appears to be in Urdu, with the title asking 'How is Trump's Iran deal different from Obama's nuclear deal?'. However, the actual body of the article is truncated, only showing 'امریکی صدر ڈونلڈ ٹرمپ کا ایران معاہدہ سا' (American President Donald Trump's Iran deal sa...). Without the full content, it's impossible to provide a detailed summary of the differences between the two agreements, the key facts, context, or why it matters. The article seems to be discussing a comparison of US policy towards Iran under different administrations.