So the FAQ says both this: Q: How is this server different from other Progression Servers? Mangler is will be a more traditional Progression Server that will provide a more familiar EverQuest experience. The XP rate will be equivalent to that of Ragefire But then it says: Q: What’s the XP rate on Mangler? Earning experience on the Mangler server will be faster than original EverQuest at launch, but slower than every other progression server. So which is it? Are we getting good exp or is daybreak trying to pull a fast one on us or did it just not get fully updated? Source: https://www.everquest.com/news/mangler-progression-server-faq-2019
Previously asked and answered in a few threads. Former is from the new release after the changes. Latter is the original. Didn't get removed or updated correctly.
Also, Q: How is this server different from other Progression Servers? Mangler is will be a more traditional Progression Server that will provide a more familiar EverQuest experience. The XP rate will be equivalent to that of Ragefire Compare the bolded, so, not very different?
In other words, it'll be like Ragefire's fast XP rate, but with the other TLP's truebox code and other added features like AoC.
Even though is says different from other Progression "Servers" I interpret this answer as a comparison against the Selo server. Selo is very non-traditional in a number of ways, whereas Mangler is not.