What are the pros and cons between "resigning" from a job, vs being "let go?"?

I lost my job April 1. However, I’m under contract until June 30, so I’ll be paid until then. I will have the option at that time of resigning if I chose.

The only difference I can think of is that I wouldn’t qualify for unemployment if I resign. Are there other things that I haven’t considered? Would it look better if I could legally tell prospective employers that I left voluntarily?