Perhaps 'inferior' in some dimensions, but trying harder with every scrap of legal data they can acquire. That's what I'd expect from any upstart against an entrenched leader, a leader with a long headstart and giant informational advantages via ubiquity and scale.
Google leverages every legal scrap of information they can get their hands on to improve their services – including the outlinks of every site they crawl, and clicks of users all over the net. If there's a legal way to observe the users and content of Google's sites for info about which other sites are good – and I haven't yet seen an allegation from Google that Microsoft is doing something illegal – why should any company refrain from using those signals, given Google's giant use of such info from elsewhere?
Google leverages every legal scrap of information they can get their hands on to improve their services – including the outlinks of every site they crawl, and clicks of users all over the net. If there's a legal way to observe the users and content of Google's sites for info about which other sites are good – and I haven't yet seen an allegation from Google that Microsoft is doing something illegal – why should any company refrain from using those signals, given Google's giant use of such info from elsewhere?