Should return status 404 or 301 when a product page is removed?

Question

consider of SEO, which one is better?

Answer 1

For better SEO,
You can either redirect your page, set 301 page,
or set 410 page to show the page content is deleted.
All these options can be done from .htaccess file

Answer 2

404 if u want to be like google
301 if u want to be like me