I actually have to disagree with Candace on this one - there are quite a few differences between the two sets, so I wouldn't necessarily buy the Oven and Food set as a direct replacement for the earlier set.
First of all, this oven is a different color than the other set's oven. I actually prefer the color of this one, which has a more realistic pinky-clay tone compared to the more yellowish color of the original. However, it is lacking in the details of the original; the "smoke" trails are very clearly airbrushed (and they come across as purple because of the pink of the oven), and the fire inside is not painted to resemble embers like the original oven.
However, the paddle does fit in both of them without tilting it sideways.
The unbaked loaves of bread are basically the same in both sets, although my earlier set has more rubbery loaves, whereas this one is harder plastic. The baked loaves are colored differently - Original bun on left, Oven and Food bun on right
As you can see, the coloring on the original is more yellow (mine actually has some damage to the top so please disregard green streaks ) and the newer one is actually better and looks tastier.
Finally the corn. Also different - the original corn has larger, more irregular kernels (I only have this sole survivor which came in a lot) and a shinier finish, and it also appears to have had a real husk stem at some point. The newer corn has plastic stems and a different kernel pattern.
I actually think this set has several strengths and it is definitely fun to play with. Even though the mano/metate are plastic now they still look realistic (and have more weight than I was expecting), the fresh chiles are a nice contrast from her dried paper chiles, and you have a chance to get the oven again. Basically, if you don't have the original this one is a fine substitute but just know that they aren't identical.