Wendy's vs Arby's.
Two different philosophies: a clean natural-cut fry vs a seasoned wheat-batter curly fry. The sodium gap is staggering.
Two chains with crinkle-adjacent fry identities and nothing else in common. Wendy's runs a clean, no-coating "natural-cut" fry with visible skin-on edges and sea salt seasoning. Arby's runs a curly fry with a seasoned wheat-batter coating that has made the product a cultural icon for thirty-plus years. On Frypedia's metrics, they aren't really comparable — but customers ask the comparison anyway, so we'll walk it through.
The sodium gap is staggering.
A medium order of Wendy's Natural-Cut Fries: 420 mg sodium. A medium order of Arby's Curly Fries: 1,390 mg sodium. That's not a typo. Arby's curly fries deliver more than a full day's worth of the American Heart Association's recommended sodium allowance in a single medium side. It's the highest sodium number for any fry product on Frypedia, by a wide margin.
The reason is the Cajun-adjacent seasoned coating. Curly fries aren't just salted — they're battered in a wheat-and-spice mix that contains a substantial amount of sodium even before the post-fry salting step. If you're counting sodium for any reason (blood pressure, cardiac history, CKD, or just general dietary awareness), Arby's curly fries are the single worst fry choice in fast food.
Wendy's at 420 mg is firmly mid-pack — not as clean as Chick-fil-A (240 mg) or In-N-Out (250 mg), but far better than Arby's. If the question is "which fry is less sodium-loaded," Wendy's wins by a mile.
The wheat problem at Arby's.
Arby's curly fries are not just celiac-unsafe because of the shared fryer — they contain wheat in the coating. The seasoned batter that makes the curly fry a curly fry is wheat-based. Even a theoretical "dedicated fryer" scenario wouldn't make Arby's curly fries celiac-safe.
Arby's introduced a Crinkle-cut fry in 2021 that is wheat-free at the ingredient level. It's still cooked in shared fryer oil with Mozzarella Sticks, Jalapeño Bites, fish, and other wheat-and-dairy items — so it's not celiac-safe either, but at the ingredient level, the crinkle is clean where the curly isn't. If you're at Arby's and you want a fry that starts clean, you order the crinkle, not the curly. It's a distinction most diners don't know to make.
Wendy's natural-cut fries are clean at the ingredient level — potatoes, soybean oil, dextrose, sodium acid pyrophosphate (to preserve natural color), and sea salt. No coating. No wheat. No dairy. The shared fryer is still a problem for celiacs (wheat and milk and fish all share the oil), but the base product itself is as simple as a fast-food fry gets.
The calorie and fat gap.
Medium Wendy's: 350 calories, 16g fat. Medium Arby's curly: 550 calories, 25g fat. The Arby's number is 57% higher on calories and 56% higher on fat — both because of the coating (adds weight, absorbs oil) and because the curly cut presents more surface area to the oil.
Every dimension of fast-food fry nutrition favors Wendy's over Arby's curly. This isn't a close comparison.
So why does Arby's still have loyalists?
Because the Arby's curly fry is, for people who grew up eating it, the purest example of fast-food flavor engineering. The seasoned coating creates a complex savory-spicy-salty signature that a clean potato-and-salt fry cannot replicate. Wendy's natural-cut is a cleaner product; Arby's curly is a more flavorful one. These are different products solving different problems.
Arby's marketing has long embraced this distinction ("We have the meats" for protein, plus fries that aren't trying to be clean). The curly fry is unapologetic about being a fried-potato delivery vehicle for a proprietary spice blend. Wendy's, by contrast, has spent years emphasizing the "real" quality of their fry — natural-cut, skin-on, sea-salted.
The verdict.
If you're watching sodium, Wendy's wins, and it's not close. Arby's curly at 1,390 mg is an outlier even in fast food.
If you're vegetarian, both work by ingredient. The Arby's curly coating contains wheat but no animal products.
If you're celiac, Wendy's is the cleaner choice (no wheat in the fry itself, only in the shared fryer). Arby's curly has wheat in the coating. Arby's crinkle is wheat-free but still shares a fryer.
If you're counting calories, Wendy's is 36% lighter at medium sizes. An easy win if nutrition is the tiebreaker.
If you care about flavor-forward fries, Arby's curly is genuinely unique. The seasoning is the product. Wendy's is cleaner; Arby's is more intense.