What’s the difference between the 2026 Swift Challenger 580 and the 2026 Swift Challenger 580 Grande?... It’s 6 inches 📏 Although that might not sound like a lot, when you step inside the 580 Grande you can really feel the difference in the space that the extra width gives you. It means you’re less likely to be knocking knees while sat as a group in the front seats. And crucially, if you need the toilet in the night, you have a lot more passing space at the end of the bed. But don’t just take o