Worth noting, toroidial transformers are more easily saturated, which means much stronger turn-on current surges. A somewhat larger fuse, or slow-blow type, or NTC, may prove useful to handle or mitigate this.
They're also apparently much better at wideband performance, so you can use a 240VAC 60Hz transformer down to 80VAC 20Hz, and at least as much voltage beyond 20kHz, often to 100kHz. Which is handy for audio transformer applications, particularly tube amps.
Tim