So I think I understand the differences between core (update), feature upgrade (crossgrade) and full upgrade (more books etc). But in looking at the recommended feature upgrade cost for me it would be actually a little cheaper to purchase logos 6 starter. If I did that I would not lose my books from my previous logos 5 and purchased books correct? Also, the starter should contain the same core engine, features and datasets I presume.
I want to say I love my logos software but I am a simple lay person who started off with the leader's library of old. the feature crossgrade is almost $300. If I was in ministry and could charge it against a budget or expense the cost that would be okay, but alas that is not the case.
UPDATE: Actually I sort of answered this myself, the logos 6 starter contains much less than the feature upgrade. Leaving post in case others thought the same.