On their debut albums, they both pretty much got the same push. Two singles, two videos and so so promo. The thing with Rihanna is that she had a #2 record on the Hot 100 and was at the time breaking some record (fastest digital download seller or some shit). So yeah, she got more attention and actually appealed to a wider audience. If it seemed as though Rih got a bigger push, thats what a ht single naturally does.