We give an almost complete description of the coarse and uniform
embeddability between Orlicz sequence spaces. We show that the embeddability
between two Orlicz sequence spaces is in most cases determined only by the
values of their upper Matuszewska-Orlicz indices. On the other hand, we present
examples which show that sometimes the embeddability is not determined by the
values of these indices.Comment: 12 pages. This is the final version. To appear in Mediterr. J. Mat