they "might" burn out faster, even if they do, they supposedly hit better, give more vapor, and are harder to flood. paintedlady...there are officially 2 different 901's. this is not steves fault. check the back of the instruction manual. it clearly states dse 901 as the model #. the mfr.'s are trying to confuse us. keep in mind that one of the things that made puresmoker famous(besides his service) was the performance of his version of the 901.