Knowing how crap Spotify app is (an Electron monstrocity on the desktop) that's for the best.
Latency is hardly the main downside of Electron.
As far as resources usage goes, Spotify is definitely worse. If you browse through a few artists and albums, memory usage quickly soars pst 500MB and can reach 1GB, which is ridiculous. iTunes doesn’t do this at all and hovers at 200MB in most cases.
Spotify loads wholly separate copies of all JavaScript dependencies for each major sub component on screen. Efficiency is not even remotely that dev team’s strong point.