If the resistors have equal resistance the voltage will be divided equally. That's Ohm's Law... The voltage is proportional to the resistance... That's how a voltage divider works. (And that assumes no arcing. ) [
This is absolutely true.
I apologize, I was remis in omitting my reasoning.
The OP seems to be new working with high voltage. When building the divider, if the resistors are wired close together or some get contamination on the surface, things could (not will) go bad. Contamination could be finger grease solder rosin etc. But in the end it is my opinion and how I would do it.