Huawei p20 pro dual / single sim?

I want to get the huawei p20 pro. On the internet I find the phone with dual sim and single sim. I now understand that this is one with 2 sim locks and the other with a sim lock. The price is also different, but are there any technical things different? Or then only one or two sim locks are?

Dual Sim lets you use 2 SIM cards (for example, home and work). Otherwise there's no difference.

There's not much difference between dual sim and single sim.

You only have room for two sim cards