Most triclad SS kettles have a 4 mm aluminum disc sandwiched (outside and inside) by stainless steel. Since aluminum transfers heat quickly, it spreads the heat more evenly throughout the entire bottom of the kettle compared to stainless steel alone. Having said that, I've not noticed people having a lot of trouble with either type of kettle. Ideally, you would have fluid (water, liquor, or wort) in the kettle before igniting the burner.
I've got the same Bayou Classic SP10. It strips black paint off the stand within seconds. Rated at 185,000 BTU's (max). Works great on my 20 gallon SS triclad kettle.