Jk9357, a 9to5Mac reader, sent in a comparison video to highlight the enhancements. The change is most noticeable on the words "potato" and "America".
Play the video below and see if you can spot the difference. iOS 8.1.1 is demonstrated first, followed by iOS 8.3 beta.
Apple has been steadily improving its Siri personal assistant and with the upcoming release of the Apple Watch, it will be relied on more than ever.
Let us know what you think in the comments!