Which looks cheaper today: developed ex-U.S. markets or emerging markets?
On the current data, Developed Markets ex-US has a P/E of 19.14, while Emerging Markets has a P/E of 19.99. On P/E alone, Developed Markets ex-US looks cheaper and Emerging Markets looks more expensive.
That comparison is only a starting point. Different markets can have different sector weights, growth expectations, interest-rate sensitivity, currency risk, accounting rules, and ETF methodology.