> Relying on web apps is exactly like giving governments the right to uninstall applications on your computer.
To some extent, governments, across the globe, are already exercising this right in some form. Quite often we hear that some government has banned some app and it becomes illegal to use that app in that country.
Both companies (Apple and Samsung) are in strong position right now and both are equal threat to each other.
In the highly competitive market, the company which keep innovating will sustain. Now the question is out of these companies, which one is better at innovation?
IMO, there is no harm asking for formal offer letter (probably a soft copy).
But I would suggest choose the job which is of your interest. Salary should be the second factor. If you choose a job of your interest, you will perform well there and your career growth will be much faster there.