Something to consider: The Cronus Magnum is a different animal than the garden variety Cronus, which is the one, I presume, that Vinyladdict was comparing. The Magnum uses an entirely different output tube with about 60% more output and wider bandwidth.
In addition, according to the review,
This could make a significant difference in how it fares against the Cayin.
In addition, according to the review,
The Magnum tag ... reflects a set of upgrades designed to increase transparency, improve dynamics and frequency extension, and provide for a smoother overall presentation. In the Cronus integrated these tweaks include a larger and more sophisticated power supply, the addition of polypropylene bypass capacitors, as well as precision Dale-Vishay resistors in critical spots, gold-plated tube sockets, upgraded input signal tubes, the KT90s mentioned above, as well as superior binding posts for more solid speaker cable connections.
This could make a significant difference in how it fares against the Cayin.