Hi Sili,
Worth having a good search here, as there are a few people who have asked similar questions.
The high-level answers I’d give are:
- A simple DAC + Clock configuration will be the same with either, but…
- You can plug a 10MHz reference clock into the Vivaldi Clock (there’s no external clock input on the Rossini Clock)
- The Vivaldi Clock sounded much better to me (see here)
- You’ll need a lot more space for the Vivaldi Clock, and these pics will show you part of the reason why
As @jcfrech suggests, if you can compare them at a dealer, you should