Brent's move higher on tonight's regular reopen, coming after Iran's missile strikes on US bases in Jordan, is a live illustration of why the two benchmarks aren't interchangeable for traders positioning around geopolitical risk. Brent's price is built on seaborne North Sea crude and functions as the reference point for globally traded oil, so it tends to react faster and more directly to Gulf shipping and Middle East supply threats. WTI, priced off landlocked US production delivered at Cushing, Oklahoma, is more insulated from a Gulf-specific shock and more sensitive to domestic US drivers such as shale output, refinery demand and Cushing storage levels. That split is why a trader specifically wanting exposure to Middle East or global shipping-lane risk will typically reach for Brent, while one focused on US supply and demand dynamics will lean on WTI. The spread between the two contracts is itself a widely watched metric, since it widens or narrows based on relative regional supply, logistics and export capacity.---Earlier:US and Iran continue to trade strikes. Tehran hits US bases in Jordan.---WTI and Brent both price the same commodity, but which one traders watch closest often comes down to whether the risk in front of them is a US story or a global one.Summary:Brent crude on ICE reopened just after 8pm New York time, its regular overnight reopen, up around a dollar following Iran's missile strikes on US bases in JordanWTI (NYMEX/CME) and Brent (ICE) are both light, USD-denominated crude benchmarks, but they price different physical crude and serve different roles in the marketWTI is priced off crude delivered at Cushing, Oklahoma, a landlocked US hub, making it more exposed to domestic supply, shale output and storage levelsBrent is priced off seaborne North Sea crude (the BFOET basket) and effectively cash-settled, making it the reference point for globally traded, waterborne oilThat structural difference explains why Brent typically reacts faster to Gulf shipping threats and Middle East supply risk, while WTI is more sensitive to US-specific driversThe two contracts also trade on different home-market hours, Brent aligned to London, WTI to New York; on a typical day Brent's overnight reopen at 8pm Eastern falls two hours after WTI's close and reopen at 6pm EasternBrent crude reopened just after 8pm New York time, its regular overnight reopen, up around a dollar, after Iran fired more than 30 missiles at US bases in Jordan following a fresh round of US strikes on Iranian oil tankers near Kharg Island and Jask. The reaction is a useful real-time example of a distinction that matters more to traders than most casual coverage acknowledges: WTI and Brent price the same broad commodity, but they are not simply interchangeable versions of the same trade.Both contracts are light, sweet crude benchmarks quoted in US dollars per barrel, and both are among the most heavily traded commodity futures in the world. That's largely where the similarities end. WTI, traded on NYMEX under CME Group, is priced off crude delivered at Cushing, Oklahoma, a landlocked storage and pipeline hub in the middle of the United States. Brent, traded on ICE Futures Europe, is priced off a basket of North Sea crude grades collectively known as BFOET, and the contract is effectively cash-settled against a seaborne physical market rather than tied to a single onshore delivery point.That structural difference is exactly why Brent moved on tonight's news and WTI's reaction, while still present, is typically more muted in these specific scenarios. Brent represents crude that has to travel by ship to reach a refinery, so anything threatening tanker traffic, chokepoints or Gulf shipping lanes feeds directly into the price. WTI's underlying crude never touches a ship before it's priced, so a Gulf shipping threat affects it mainly through the secondary channel of the broader crude complex moving together, rather than a direct hit to WTI's own delivery chain. The flip side holds too: a US-specific shock, a major Cushing inventory build, a Permian pipeline outage, a US refinery fire, tends to move WTI harder than Brent, since that news has no direct bearing on North Sea or Gulf loadings.This is the practical reason a trader chooses one contract over the other beyond simple habit. Wanting exposure to Middle East tension, OPEC+ decisions affecting internationally traded barrels, or global shipping risk generally points toward Brent, since it's the benchmark actually built from that supply chain. Wanting exposure to US domestic energy policy, shale production trends, or refinery demand points toward WTI. Many desks trade the WTI-Brent spread directly rather than picking one side, since the gap between the two benchmarks widens and narrows based on exactly these regional supply and logistics dynamics, and can be a cleaner way to express a view on relative rather than absolute price direction.The two contracts also sit on different home-market clocks, which matters for anyone timing entries around news. Brent's trading day is built around London hours, with its deepest liquidity typically falling between roughly 9am and 3pm London time. WTI's is built around the US day. On a typical weekday, WTI closes and reopens at 6pm Eastern, while Brent's overnight reopen falls two hours later, at 8pm Eastern, meaning Brent is often the one still closed, and the one traders are waiting on, when a headline breaks in that gap. This article was written by Eamonn Sheridan at investinglive.com.