They're both "Big Banjo" BG14 burners. If there's a BTU difference between them it's the particular orifice they include, so you can fit a low pressure orifice and run it with a low pressure regulator.
I have a pair of these running high pressure (20psi "green" propane regulator) and I don't think there's a better behaved burner out there for the price...
Cheers!
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