Which tick history is right for me?

[Fernando Andr Pelaez Menendez]

Hello everyone. I am doing backtesting work on several strategies. I plan to use IC Market to trade in real.

Now, as you know, icmarket does not offer its tick history and recommends using the QuantDataManager application to download the history of the pairs I need. Now, it only has two sources: Dukascopy and Darwinex. 

I tested with both sources, to see if the results varied much, and indeed, there is a significant difference.

Which one do you think could be the closest source to the results I can get in icmarket? Thank you very much