Both of those links are to "review" sites.
HostingAdvice is just you average scam/sham site, suggesting that you use EIG brands (
BlueHost,
Hostgator, etc). Understand their advice is for themselves to profit off you. Or rather, to profit off your misery, as EIG is a truly miserable experience.
That other sites is a mix, both with good and bad advice.
- Cloudways and
Hostgator (EIG) have no business being in their lists.
- And while
A2 Hosting and
Siteground are quite excellent providers, neither are optimized for Magento.
Magento is a beast of an application, with a new install comprising 10k+ files and wanting lots of resources. Add a few users, and the site gets stressed very easily on a shared server. Admin/users of this store needs to pay close attention to caching, PHP, MySQL and RAM.
Nexcess is what you want for Magento hosting.
The other option is your own 2gb+ managed VPS. That's best for having multiple Magento stores. For example,
LiquidWeb,
Knownhost, or
IOzoom.