From what I’ve seen, the main difference is usually regulation, client protection, and how trading conditions are presented. When comparing UK forex brokers, I tend to look beyond spreads and commissions because FCA oversight, transparency, withdrawal rules, platform quality, and customer support can matter just as much in everyday trading. International brokers may offer broader markets or more flexible conditions, but the level of regulation can vary a lot. I usually compare several options first, especially their trading tools, account funding methods, mobile access, and how clearly they explain potential risks.