Short verdict
Choose SiteGround when the business wants stronger managed WordPress support and a more dependable hosting middle ground. Choose Bluehost when the website is simpler and the goal is a mainstream lower-cost launch path.
Pricing considerations
Bluehost has the cheaper entry-level story, though long-term hosting value depends on site importance and support needs. SiteGround is easier to justify when the business wants stronger managed features and is willing to pay above mass-market entry hosting for them.
Performance and ease of management
Bluehost is approachable at a mass-market level, but SiteGround is usually easier to manage once the site becomes more important because the managed WordPress feature set is stronger and more deliberately business-friendly.
Implementation and migration comparison
Both can be launched without much difficulty. SiteGround is usually the cleaner destination if the business wants hosting that will age better as the website becomes more commercially useful. Bluehost remains workable for simpler websites and lower-stakes launches.
UK small business suitability
SiteGround suits UK businesses that want a stronger support-led WordPress host without going premium. Bluehost suits UK buyers launching simpler sites that do not yet justify paying for a more managed hosting route.