Does the patreon version have exclusive content or is it just the game early access?
For as far Patreon is concerned, T1 gives you early access to new patches, however T2 and T3 Patreon subscriptions give you access to an in-game patron shop. Both Tiers appear have their own items so you need T3 to get all of it, however I'm not a sub myself, I'm just going off of what is on Patreon