can I ask why you are asking between just those two?
We have a favorable review of the Visionsat IV-200 here on the forum.
It's about the same price, and can record with an external USB hard drive.
Perhaps other users will comment on it.
The Coolsat models seem to be built by a different supplier, so I don't think the company's good reputation for their old receivers necessarily flows forward.
Time will tell. And I hope it works out well.
Their long warranty seems a plus.
What is it exactly are you looking for in a receiver?