This varies from person to person likings. But on Patreon, you can only support monthly. But in Buy me a coffee, you can accept Donation at one time, Monthly, annually, or by selling Extras. You will get much more options in Buy me a Coffee. Patreon is also easy to get started with no fee. But they charge specific percentages from your earnings. Where Buy me a coffee only charges 5%, and they don't have any premium plan.