Oval Shaped Mangosteens

I never knew that mangosteens have two (or maybe more than two, I don't know) varieties. One is the round type and another is the oblong/oval shape type. The oval shaped variety of mangosteen is slightly smaller in size than the round ones. The flesh is also firmer and sweeter. The hubs bought a packet of oval shaped mangosteens the other day and I personally prefer the oval shaped ones.