My company giving me options to resign or terminate the contract

I am working for a UK company and I was hired via an Employer of Record (EoR), which in this case is Deel. I am on Verification against EU law for Union citizen family members (EU family member) permit.
I was contacted by the company CEO (not Deel) and gave me options of resignation or termination of the contract. I have been working for 1 year and 3 months. I would like to know which option is better. Do I get any unemployment benefits (Taxes and social security is deducted from my salary)? Will it cause an issue if I get the unemployment benefits for my permanent residency? Also, with termination I am not sure what all I get from the company and for unemployment benefits, the duration of the benefits is unknown. Any input will be useful.