BARCELONA, Spain – Reigning champion Lewis Hamilton believes Sunday’s win in the Spanish Grand Prix has allowed him to gather crucial information on main rival Max Verstappen, as he bids for his fifth straight world title and eighth of a stellar career.The Brit stormed to victory at Circuit de Catalunya, finishing 15 seconds clear of the Dutchman to post his third win in four races and get the upper hand in the early season rivalry.Despite starting on pole – the 100th of his career – Hamilton was passed by Verstappen on the first corner before battling back to overtake the Red Bull with six laps left.