I was using the 801 atty that came with my Prodigy for a week before it stopped working. I've been using my old RN*** atty that I got from Puresmoker in February since then and it's working like a champ
I don't know if this had anything to do with it, but the one that died was working fine until I dripped JC smoke juice on it. I've been using the JC on a back up of the same atty and it's still alive.
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I have read on Trog's site, the RN4075 is a power monger. They have better tolerance to higher power, Trog recommends them.
The 901 does not take as much power to "ignite", but burns hotter.... thus possibly a shorter life span?