Hi! They are completely unique and serve different purposes.

nostr.wine is a “typical” paid relay. You have to pay a one time 18,888 sats admission fee to be able to write to the relay but anyone can read from it.

filter.nostr.wine is a paid subscription service (5000-10000 sats per month depending on duration of purchase). Filter is a public/free relay aggregator with several additional features. Here are some of the highlights:

- Aggregates notes from the largest 20+ free relays

- Broadcasts your notes out to 10+ free relays

- Also broadcasts to your first 4 "write" relays and the first 4 "read" relays from the first 5 tagged users (NIP-65 list)

- Offers a (configurable) follows+follows filter for “global” view so you can explore notes outside of your immediate follows but still within your network

- Full text search across all aggregated events