Neither offers a static IP.

Use a tunnel for inbound. Use WARP with static egress for outbound.

To understand why a Static IP add-on is so valuable, you have to look at the traditional method of securing servers:

Use the static IP for:

Instead of your traffic exiting random data centers, Cloudflare routes all your organization’s WARP traffic through a (or a small pool of them) that is assigned exclusively to your account.

Note: This feature is primarily available for (Zero Trust) plans, not the free consumer WARP.