Are structs of variables of the same type layout compatible with a struct containing an array of that type?

Question

Are these 2 structs layout-compatible?

struct One {
    float x, y, z;
};

struct Two {
    float c[3];
};

Both contains 3 floats, so in a

Answer 1

The compiler is allowed to add padding between members in a class or struct.

Array elements are in contiguous locations.

They may not be layout compatible depending on how the compiler organizes the members in the struct.