Tried In N Out the first day I moved to Texas. Underwhelming. Whataburger all the way ever since.
Whataburger basic burgers had me at 50/50 with Wendy's for fast food burgers but the Sweet and Spicy Bacon Burger is the greatest of all time. Actually wrote to corporate demanding it go on the permanent menu instead of a seasonal specialty burger and now it's there...so...you're welcome 'merica. It was all me
. Monterrey Melt, Green Chile Double, Chophouse Cheddar are great too, but once the S&S became an everyday menu item it has ruined me for all other fast food burgers. An In N Out burger is basically the kids menu burger at Whataburger.
Also, confirming earlier comments, Whataburger spicy ketchup is fantastic. Not a ketchup guy but stockpile that shtuff!
Also also, bacon and bell peppers and jalapeños for fixin's at Whataburger vs thousand island slop at N Out.
Also also also, Whataburger Jalapeño Cheddar Biscuit w/ Sausage is the best breakfast sandwich at any fast food place.