What's the difference between Sinfonia, OrchExtra, and InstrumentalEase?

For all intents and purposes, they are the same. Sinfonia is our patented software that powers InstrumentalEase and Orchextra. InstrumentalEase is the brand Rodgers and Hammerstein licensed titles. Orchextra is the brand for titles licensed by Music Theatre International. In all cases, the technology under the hood is identical.