Does a USB 4G dongle connected to a router perform differently to a router with a 4G SIM slot built-in

I think I covered the question in that beasty title but I'll give some background to the question.

We are organising a charity LAN event and need a method of getting reliable Inteet access via 4G for say 15+ computers. We've narrowed it down to a 4G USB dongle connected to a router and connection sharing, versus a router with a 4G SIM slot built-in.

My question is are these two solutions any different?

I personally suspect that the USB dongle might process the packets it receives which incurs an extra overhead and so whilst you get the same top-end bandwidth, you might actually only be able to process fewer packets per second compared to a router with a 4G SIM.

Another solution was a MiFi device, but these often state 5-10 devices maximum which leads me to conclude that they are processing packets and cannot handle the extra overhead from more devices. A 4G router with SIM slot for example states 32 devices maximum.

Recent Questions...