Which one is more beneficial, passing CCNP concentration exam or CCIE lab exams after clearing Cisco CCNP ENCOR exam?

It completely depends on your needs and priorities.

Concentration exam focus on Cisco tracks in-depth and you can move further in your desired direction. 

Let's say if wish to remain in the routing domain and want to learn advanced routing and services you can go with (300-410 ENARSI) CCNP concentration exam. Similarly, you get SD-WAN, Enterprise Networks, Wireless Networks to choose from.

Now talking about CCIE Enterprise Infrastructure V1.0, then attempting and passing this lab exam you can become CCIE certified in Enterprise track.

So, choose wisely as per your needs.

For more details on Cisco CCNP certifications, click here -

https://blog.networkbulls.com/cisco-unleashes-new-ccnp-certifications-with-advanced--capabilities