The difference is in encryption. WhatsApp has end-to-end, while other FB products obviously do not. Also, the current lack of ads. It's an improvement even if not a perfect solution.
I think what I'm saying is specifically it is facebook whatsapp like it is google gmail or apple messaging.
it appears that people often refer to this as different companies and they are not.
it being e2e encrypted does not change who owns, makes decisions on where the future of it goes, and if it will continue to exist in 5 years. it is still facebook and not 'whatsapp' by itself above and in many areas people refer to whatsapp and instagram as different entities and they are not, I'm concerned with people acting like it is.
to me you are still using facebook just an 'app' under facebook.
I feel this is akin to saying I use gmail but not google.
am I wrong here?