Lol it seems like every seed company makes their own variation of all strains keeping the same name. There may not be any such "real white widow". I would suggest purchasing the cannabis cup winners, only the seed companies strains that have won awards.
Yea ww won CC with GHS but then the breeder left and started Mr.Nice seeds and took his CC gentics with him now named Black Widow. Go to the mr nice online I think it might say it on the site under black widow description.