Yup I realised that point as I was typing it haha but I wanted some discourse (I dont post here often) , I imagine it as both characters are driving on opposite sides of a road in opposite directions, they may see each other as they pass by with regards to becoming more passive or more aggressive. But for some reason I think just personal preference it doesnt strike a similarity chord in me. With regards to end result I think it wouldn't be very similar because of whats driving the present changes, the motivations behind them as well as the different POVs of the characters. Spensa and her POV of herself is so radically different to shallans view of herself in that how they interpret things wouldn't be the same/similar and therefore a similar end result wouldn't occurr either. I think thats why I dont see them as similar characters even down to personality, they have gaps/areas to develop which contrast but their personailities ( shallans at heart being more scholarly intrigued, intellectually witty whilst spensa more dive in head first, science later, jerkface insults) don't resonate either. I do however find the thought of them meeting immensely amusing, id say spensa would be seen as more similar to kaladin from shallans point of view ( although now i say that I realise kaladin and shallan had the whole "we're both broken" thing in common but I was thinking more meathead soldier view of kaladin).
Long story short from what I see of both so far they seem to interpret and process stimulus differently, the areas they have to develop align but their POV is too different for me to say I find them similar.
Thank you though Im finding this really interesting!