But remember structure padding, which the compiler is free to add in the middle (and end) of a struct (though there are pragmas and/or attributes to pack structs). IOW, an array and a struct are not necessarily the same in memory.
That's completely true, however in practice any extra padding shouldn't matter unless you're trying to do some funny buisness or are severly memory constrained. If all you really needed was a fixed-sized array, then it should work exactly the same, even if it technically uses a byte or two more. (Edit: And of course, while I think you already know this, the compiler can't add padding inside the array, so the array it self will still be exactly the same memory-wise).
With that, I wouldn't expect that any padding would be added since the array should already have the same alignment as the `struct` anyway - but compilers are known to do weird things from time to time, so it's definitely not impossible.
