What is the difference between the Pipe TL Block in Simscape and Simscape Fluids?

Hello everyone, I just started to use Simscape Fluids and wanted to compare the two Pipe Blocks in the Thermal Fluids Domain. I used the water hammer effect example and added the Pipe TL Block from Fluids. when I look at the temperatures at the nodes I see slight differences. But the most astonishing difference is at the outlet of both pipelines. Why is the effect so different? I know I am looking at less than mK, but the system I am designing is all about mK. Thanks for your help!