In my case for these reasons:
- In AWS, in free tier elegible (a free basic VPS for 12 months), Ubuntu with MT4 has better performance than Windows (with the same hardware machine conditions)
- Under the same machine conditions, in AWS a VPS Ubuntu based is cheaper that Windows VPS
Ubuntu just more economic and better performance for cheaps VPS with the same hardware. If you wanna use Zorro and MT4 in a free VPS for 12 months, under Windows is very hard because of the slow performance. If you can afford a good paid VPS Windows based go for it.