3080 on laptop is slower?

[Nexus3]

Hey!

I am considering buying this for hashcat as it packs a powerful gpu 3080. 

https://www.bestbuy.com/site/asus-rog-ze...Id=6477441

I am wondering if having a dedicated/integrated GPU is going to be significantly slower/less powerful than having an eGPU of the same model of 3080?

Any advise is much appreciated.