Both the lines would have the same slope since they are parallel. The lines would not however have the same y-intercept.
This is because in order for lines to be parallel the lines must have the same slope, otherwise they would meet at some point. They would not have the same y-intercept because if both the y-intercept and the slope were the same it would be the same line.
They would be the same because they would stay distance apart and they would be different because the lines might have different lengths or widths.