It's really quite different. Bellard is inspiration, he creates paths to new and interesting things. DJB's avowed goal is to put the security industry out of work by not having bugs through rigorous practices.
Bellard is what you use on your laptop to have fun, DJB is what you run in your bank to make the world go round.
While DJB may be more "bank" oriented, plenty of people have been making the world go round using Qemu and FFMPeg. I'd argue that Youtube (if I recall correctly it was and possibly is one of the major users of FFMPeg) has had just a big of an impact as online banking.
Bellard is what you use on your laptop to have fun, DJB is what you run in your bank to make the world go round.