Betelgeuse is probably older, but it's hard to give exact ages for stars. Both of them are only a few million years old, much younger than our 4 billion year old sun.
See related questions for more details on the ages of those stars.
Rigel is blue and Betelgeuse is red.
Rigel is brighter than Betelgeuse.
Betelgeuse is much larger than Rigel.
Betelgeuse is much larger than Rigel. Betelgeuse has a radius about 15 times the radius of Rigel, and a volume of about 3500 times Rigel.
Rigel is brighter.
Rigel is blue and Betelgeuse is red.
Betelgeuse is much larger than Rigel.
Rigel is brighter than Betelgeuse.
Betelgeuse is much larger than Rigel. Betelgeuse has a radius about 15 times the radius of Rigel, and a volume of about 3500 times Rigel.
Rigel is brighter.
Simply because Rigel is hotter.
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Even though Betelgeuse is much larger, Rigel is brighter due to its much higher temperature. Rigel is about 11,000 K and Betelgeuse is only about 3,500 K.
No, Rigel is hotter. Rigel is a blue star with a temperature of about 11,000 K, and Betelgeuse is a red star with a temperature of about 3,500 K.
Betelgeuse and Rigel are the two brightest stars in the constellation of Orion. They are very easy to spot, with Betelgeuse being at the top left and Rigel at the bottom right. Comparing the two it is also easy to notice the difference in colour as Betelgeuse is a red supergiant and looks reddish in colour, very different to Rigel.
Betelgeuse is a red supergiant star and the Rigel is a blue supergiant. Both are in the same constellation Orion
Betelgeuse is around 10 times greater in diameter than Rigel.