It handles CAN FD frames at 5 Mbps, so it keeps up with the faster data payloads without swapping to a different bus architecture. The AEC-Q100 qualification means the silicon and package have passed the stress tests automotive OEMs require — not just a commercial part with a wider temp range slapped on.
The 120 mV receiver hysteresis keeps the bus from chattering on a noisy line — that is built-in noise margin, not something you have to add with external filtering. One driver and one receiver per package, which is the normal CAN node count.
For dual-sourcing, the TCAN1051 family includes pin-compatible variants with different supply ranges and wake features; check the family datasheet for the exact feature set that matches your BOM.