Why Xilinx Ten Gigabit Ethernet PCS/PMA IP Core 32-bit version use less resources than 64-bit version?

Started by Qiu Shui July 3, 2021
The 32-bit version should have better latency performance but I think it's more complex, so it should use more resources. 

But as the link below

32-bit version is better in all kinds of aspects of resource utilization. 

If the 32-bit version has better latency, needs less resource. What's its cost to get these advantages?

I'm totally confused.