Building new Network with Cisco 9000 Catalyst Hardware, What do I have to watch out for ?

We as an implementation Team got the Task to build a network from scratch. Complete new Network.

After long discussion with the customer they decided not go with "old" Cisco Hardware like a 4500E as a Core and 2960X or 3650 as an access Switch.

They took the decision to go with the new Cisco 9000 Catalyst Series completly. So there Plan is now to use 9400 as a collpased core and 9300 as access Switch.

As this is my first implementation of Cisco 9000 Series, I wanted to ask you guys, if somebody can give me an advice what to watch out for, while implementing these devices. Is there any difference in the configuration procedure in contrast to Cisco 2960/3650/4500/6000 ?

We will not use any fancy feature like "SDN" etc.

Thank you in advance !