What's the Brymen top high-end DMM now? BM869s (2011) or BM789 (2020)?
What do you mean? For electrician that works on 3 phase systems, one with measurements for that would be top.
If you mean best DC specs and longest scale, than BM869S and BM859S are best still...
You must study datasheets closely, for some ranges BM859S is slightly better than BM869S...
Also, ask yourself how old is Fluke 87 or 287....
BM869S is a few years old version of BM869 (without S)...
It's a multimeter, nothing new there, electrons didn't change lately...