Long story short, most of developed EU countries will tax you at a rate of about 50% (give or take), which is in your case about €200k. This leaves you with countries bordering the EU like Romania, Bulgaria, Estonia or the islands like Cyprus or Malta. If you want to stay in Europe Romanian micro-company could be a great fit and if you have some relatives there - great! Ask some questions, get some ideas how things work there and it might work for you.
In Dubai, on the other side, with this kind of money (€200k) you would burn on taxes in Europe -︀ you could easily live a year in a very good apartment or villa and have︁ a maid available 24/7 that will cook for you, do laundry clean up the place,︂ take care of kids (in case you have them), drive a good car (as you're︃ a petrol head and not some 2.0L diesel - we're talking about the real deal︄ here - 6.0L V8) and not worry much about the petrol cost, have a lifestyle︅ that's unimaginable in Netherlands.
And the best part of it: YOU are the one that︆ gets to choose what you want to spend this €200k on while in EU that︇ money is taken from you as taxes and with what's left you still have to︈ pay for the rent and for the car and for the petrol at €2/L -︉ but no maid, no sun 24/7/365, no beach bars and no fun - just work,︊ pay taxes and die! And you could stay in Dubai for 8 months a year︋ and go to Europe during the summer (Jun-Jul-Aug-Sep) if you want to escape the heat.︌
Would you save some money in Dubai?
Maybe yes - maybe no - depends on︍ you.
But even if you have burned all 200k/year - that would be the money︎ well spent on YOU and you would get something in return for your money.
For me this is a no brainer. Romania (if you can figure it out) or Dubai.️