Syrah wine became "Shiraz" wine in Australia, more than likely because they have delightful accents and that's how it sounded coming out when they pronounced Syrah. Then companies got involved.
It's just another way to sell more wine. That's it! But now you know, if you already didn't, that they're the exact same thing. Syrah is darker than a Cabernet, which makes it one of the darkest red wines produced. It's very dry (lots of tannins) and is a really heavy (read: full-bodied) wine. It's great, so give it a shot and have a glass or two!
Syrah wine from Santa Barbara, California.
“... which makes it one of the darkest red wines produced.”