They fail to penetrate deeply if the soil is not watered deeply. There is very little difference in them, but Anabelle is supposed to be an improved form. Have the plants shipped in fall, about the middle of October. It is easier to establish the plant in fall than in spring. Just add lime in fall around the plant and gently work it into the soil.
Alkaline soil makes pink blooms.
Acid soil makes blue blooms. Some plants near foundations or old walls will be pink from the lime leaching into the soil from mortar used in the walls.