At risk of sounding the same bell here I would add that in game improvement any understanding we can make, be it in swing mechanics, club face and impact or ball flight and trajectory, by limiting any changing elements like clubs used or balls played, we reduce the opportunity for confusing results which hopefully will help us learn quicker to be more consistent.
Find a ball you like and play it and practice it so you become comfortable with the sound the club and ball make in certain situations. One thing I have learned to do is ignore the urge to hunt down lost balls and stuff my bag and then bringing these previously owned balls into play. I have a policy of not removing any ball from a golf course unless it is mine. I play ProV1 and I'm very happy with my ball choice, even my family now understand buying me other brands is not an option.