Do two large instances perform the same as an extra large instance? I'm not too familiar with virtualization but just wanted to know from a high level if they are more or less the same.
- Large Instance 7.5 GB of memory, 4 EC2 Compute Units (2 virtual cores with 2 EC2 Compute Units each), 850 GB of local instance storage, 64-bit platform
- Extra Large Instance 15 GB of memory, 8 EC2 Compute Units (4 virtual cores with 2 EC2 Compute Units each), 1690 GB of local instance storage, 64-bit platform
The RAM, # of virtual processors and storage is doubled for an extra large instance. However the price is doubled too. I was under the impression that Amazon would try to incentivize customers to get an extra large instance by making it's price less than two large instances.