Is there usually a dramatic difference between $5k and $10k cartridges ?

Dartzeel sells a million dollar cartridge.

Work your way up to it ( the Swiss shall help you launder your dirty money).

Usually yes besides the cost but like with other equipment twice the price doesn’t mean it sounds twice as good or is a better value.  

Show me some measurements (THD, channel separation, trackability) where the $10K cartridge outperforms the $5K. Otherwise subjective opinions are like looking out a window and discussing the weather.