I am worried because her skin folds appear prominent. From the sketchy information available, it sounds as though your family may have a recessive form. If your daughter's skin is truly suggestive of PXE, a skin biopsy at this time would settle the issue immediately. According to that reference, those individuals having most severe skin involvement had lesser cardiovascular involvement. A The classification of PXE into genetic types and especially subtypes is somewhat debatable.
Further subdivisions become difficult.
It is true that some individuals seem to have more severe cardiovascular, or eye, or skin involvement than others, but all patients will sooner or later develop some manifestations in all three areas. PXE has long been considered heterogeneous, meaning that it is variable in its expression and that no two individuals can be directly compared with each other in every sign or symptom. The new genetics and gene mapping project that I now have underway may answer some of these questions. I believe they also have vision problems. Similar areas of the body may be involved, but this has no particular significance.