Which has better content?
They overlap heavily on live channels. IPTV adds on-demand films and series, catch-up TV and multi-device viewing in the same subscription; cable's exclusive sports rights for certain competitions remain its strongest content argument.
If a specific competition is only broadcast by one traditional operator in Spain, no honest IPTV service can promise it to you — rights are exclusive. For everything else, IPTV's combination of live TV, an electronic programme guide and an on-demand library in a single app is hard to beat. New to how this works? Start with what IPTV is.