But your comment was about who made "Work" (a single) a hit, therefore, singles success if what should be compared, album sales are irrelevant here.
Drake doesn't exclusively make music for top 40 radio like Rihanna does. Even taking that into consideration, he has a #1 hit with "What's My Name?" and two #2 hits that were blocked by megasmashes ("Best I Ever Had"/"I Gotta Feeling" and "Hotline Bling"/"Hello").
Drake is arguably the most popular male artist in the US right now. Rihanna hasn't been hot for awhile.
