You can try this to find out:
1. start a BRIO desktop server - make sure BRIO scans your 24-bit audio files and have them available in BRIO
2. use a web-browser to login to your BRIO account (at http://www.orastream.com/brio)
3. connect your web-browser (PC/MAC) to an external DAC capable of handling your 24-bit audio and plug in your headphones or hi-fi system
4. use your BRIO-web PC/MAC to select and play your 24-bit audio albums (on the web-audio player) to decide whether high-res audio streaming sounds as good as its download.
Let us know your result.