OcuLink standard enables up to PCIe Gen4 with four lanes, which contributes to 63 Gbps,
compared to just 32 Gbps on Thunderbolt 4 connection.
(par contre pas de PowerDelivery contrairement au OcuLink)

External GPUs that are connected through TB4, typically loose around 20% of their performance.

The Oculink device should no doubt have lower performance loss.

mais pas donné (+600USD)