The BOSS SDE-3000EVH and SDE-3000D both fully recreate the sound and bypass characteristics of the original Roland SDE-3000. There is no difference in delay sound quality between the two models.
For the history and development story behind the original 1983 Roland SDE-3000, see this article: https://www.boss.info/global/promos/sde-3000_pedals/.
For the differences between the SDE-3000EVH and the SDE-3000D, see "SDE-3000EVH SDE-3000D: What are the differences between the SDE-3000EVH and the SDE-3000D?".