Equators are the most potent "natural" shrooms available. If the strain has a "+" that means it's genetically altered.
For example the B+ strain is probably just a potent as the Ecuador’s but it's been genetically altered to grow at a higher volumes.
The average size of a natural strain is about 6-10 inches long. The average size of a genetic strain (Mexican + or b+) is about 12-24 inches long.
Also, when you’re growing mushrooms you have to take in account of the complexity of the strain. For example Mexicans are fairly brainless. They require very little attention and are one of the most resilient to infection. Ecuador is more powerful but they are more susceptible to infection. If you have a professional setup at home go with the Ecuador or B+ to get a potent strain. If you don't have a professional setup then sick with a more resilient strain like Golden Teacher, Mexican, or Keepers Creepers.
