I believe torso angle when squatting is a product of bar placement. The lower the bar the more you will lean forward, the higher the bar the more upright u will be.
I have never squatted with a wide grip and do not have any experience of how it may impact my squat.
Having said all that, I can't help but wonder if u may have inadvertently or unintentionally took a different bar placement along with the wider grip.
Just my thoughts.
"The fastest way to get strong muscles is also the fastest way to make them bigger. We know what works best to make them strong in the shortest time possible. If you want to get big, do the thing that makes them strong." - Marc Rippetoe
Zdravko Veselin Gaeta
I am not a powerlifter nor am I a bodybuilder. I just want to be big and strong.