Ruben, here is a 3mm closed probe v's an open one (for EGT application) super extended but they dont last in real world (3000km in road car).
Anyway you can see the 3mm closed version suffers from never reaching temp and delays, not to mention being very long way from reporting something near accurate end figure.
This is all legacy info from decade ago put over onto the LR software to see in a nicer format.
What I have made is a probe that exceeds the fine wire super extended tip, but in a fully enclosed Inconel 600 form and many factors higher response rate, and better accuracy.