Vedanta correctly states that the spirit remains inviolable. The fiery seed of the spirit maintains its elementary wholeness, because the essence of the elements is immutable. But the emanations of the seed change with the growth of consciousness. One should understand that the seed of the spirit is a fragment of the element of fire, and the energy accumulated around it is consciousness. This means that Vedanta concerned itself mainly with the seed, whereas Buddhism spoke of the perfectment of its enveloping bodies. Thus do the changeable and the unchanging coexist.
It is quite understandable that Buddha, Who directed humanity toward evolution, taught the nature of that which changes, whereas Vedanta expounded the unchanging foundation. You can add any chemical ingredient to a flame and thereby change its color and size, but the essential nature of the fire will remain unchanged. I do not see any contradiction between the basic principles of Vedanta and Buddhism. (AY (opens in new tab), 275)