well, I wouldnt know about the non-femanized but the femanized is hardy as fuck. I would put the list like this from most hardy to least on this grow:
1. White widow
2. Bubbleicious
3. Super Skunk
4. Northern Lights
Northern lights just couldnt hang at all. As soon as there was a fluctuation in ph she really started to bitch. Very high maintenance strain. At least the strain from Nirvana. White Widow was the champ. Took PH fluctuations, took both big bloom (organic) and tiger bloom like a champ, But as soon as I flushed she also went downhill fast (thats ok, it is the last week and I expected some major yellowing going on with all of them) Bubbleicious was the same as white widow, but it showed ph lockouts earlier than white widow. Super Skunk I would have to say stayed consistant through the entire grow.