Core design using layer 3 switches

Curious to see if one way is better than another or if I'm missing something more important.

Let's say I have a collapsed core network of 6 Cisco 3850 layer 3 switches. They are connected in a ring since that's the only amount of connections available.

Is it better to make the connections between them routed ports and assign /30s to each link or have the core be a common vlan and addressed in a /29? (Assuming you will never expand the core).

I know making the ports routed eliminates STP and a tiny bit of overhead.

Is there any benefit to go one one way vs the other? I feel like I'm missing something.