That particular twist seemed as if meant to upend the 'blank slate' protagonist idea by making you think that the character you'd created was indeed such a protagonist, but revealing a full background midway. In comparison Dark Urge is all about knowing that backstory exists and trying to seek it out despite amnesia. The reveal, such as it is, is so obvious to series veterans or even someone who has watched a summary video or something, that it doesn't seem like it was ever meant to be a big mystery to the player - rather the process of how it is revealed is the point. At least, I hope Larian respects their players enough to know they weren't fooling anyway. It is a fruitful comparison though; I was reminded of it as well despite these big differences.
