By "real", I'm assuming you mean like a Gibson humbucker. In a word, no, not exactly, but it'll depend on how the single coils were constructed. If it's a traditional SC, then the polepieces are individual magnets. Gibson humbuckers use a bar magnet that touches all the polepieces to prevent string dropout and simplify assembly. Now, some cheaper SC pickups also use small bar magnets on steel polepieces for simplicity and cost, and using two of those might sound closer, but you have to keep in mind that SC pickups are usually wound hotter than the individual coils on a humbucker, so YMMV.
Check out Rio Grande Pickups. They've been using the "two single-coils as a humbucker" concept for a long time.