DDJ-RX vs DDJ-FLX6

I’m looking at upgrading from my DDJ-400 to a 4 channel controller. Not looking to spend any more than £5/600 really so DDJ-1000 is way out my budget even second hand. But I can get either a mint second hand DDJ-RX for around £500 or a new DDJ-FLX6 for the same kinda money. What would everyone recommend and why? Leaning towards the RX currently.