Impeccable drops the cream-and-serif default for a loud navy, orange and primary-color landing page set in heavy Archivo, then builds a calmer pine-and-lime dashboard. Pick it if you want a product page with real energy that still holds up on a dense screen.
Interface Design gives the default a ledger-and-pencil feel with Newsreader and IBM Plex Mono, and adds envelope icons to the dashboard. It's careful work, but you'd still take it for the baseline at a glance.