Heinkel He 111 or Savoia-Marchetti SM.79

The British Mk VIII was slightly slower than the Italian torpedo's 45 kts compared to 50 kts but carried an explosive charge that was about 35% larger than the Italian Torpedo.

Both were very good torpedo's

I think up to 1943 British used the MK XII that had an almost identical warhead (175 kg TNT) and speed than the early italians, was lighter (702 kg), but had less range.
In early 1943 was introduced the heavier MK XV, but at that time italian torpedoes were already armed with 200 kg warheads.
However, they were of very similar class.

Sal, that was funny.

The Germans used several Italian torpedos, preferring them over their own. Examples of German torpedos that were actually Italian except by designation were the F5W, F5I and LT350.

The high speed Fiume torpedo so impressed the Japanese that they copied it for several of their own torpedoes. It had a 270kg warhead, could do 50 knots and had a range of 2-1/2 miles.