I currently shoot an arrow with a straightness of .003 and weighs 10.5 gr per inch. I am looking into getting some new arrows (mostly for practice,) that have a straightness of .005 and weighs 10.6 gr per inch.
Well you clearly stated that you wanted to purchase new arrows that are less straight than your current arrow and mostly for practice.
Why is it so baffling that you received the answers that you did? We answered exactly what you asked.
Yes, the POI will likely change if you change brands of arrows.