Hmm… so you did… I see that we had a PM conversation covering that topic called ":-) retaliatory try this! :-)" back in October 2014.
So… in that case who identified the SiR800DP? Eh, apparently me heh… at the time I found it I must have recalled that PM conversation and thought that SiR800DP was the one you showed me. (FWIW note that I later realized that the SiS414DN which I mention in that post uses a different package / eg is unsuitable.)
I’m certain that I have examined SiR404DP at some point, but I couldn’t tell you a thing about it right now. :-/
EDIT: And DB Custom (then DBCstm) must have done the leg work! I certainly wasn’t shelling out $2 for an FET at the time. 