The situation is a bit complicated.
Wiki doesn't say about Power standard.
In US (UK) there is an Imperial horsepower (hp) = 745,7 W; in other world a Metric horsepower (ps) = 735,5 W.
PLUS
There are 3 main methods to estimate power - Japanese Industrial standard (JIS); American Society of Automotive Engineers (SAE); European German Deutsche Institute fur Normung (DIN). Usually JIS has Gross and Net way to measure horsepower, but gross gives the higher numbers - it is estimated without an alternator; a power steering etc. DIN is always Net and is the most conservative out of 3 mentioned.
Toyota used gross JIS around the world up to 1980 (when DIN was commonly used). After 1980 Toyota continued to use gross JIS in Japan (its better for advertising) and few other markets, but changed to DIN in other markets. Only around 1985 Toyota changed to NET JIS and DIN around the World.
So 2B diesel was never sold outside of Japan (and always had a JIS number 93), but 3B was sold outside of Japan from 08/1980 and had a DIN power 90.
Usually the difference is about 3-7 hp. In order to make it clear I made the chart above. Left scale is JIS and Right is DIN