Question: 2 which concentration for your personal solution is probably more...
2). Which concentration for your personal solution is probably more accurate and why?
Both concentrations are equally valid. It doesn't matter that they don't agree.
The concentration as calculated from the mass and volume is the most accurate. You know the mass down to two decimal places and the volume to 5 significant digits.
Neither can be said to be more accurate as you never really know an exact concentration without titrating it.
The concentration derived from the Beer's Law data. This comes from a highly sophisticated instrument and must be the most accurate.