Hemi opinions

Engine Master did a video comparing the two versions, both with a mild cam. The Eagle made like 100hp more than the early one. Get the 2014.

Awhile ago the Eagle was kind of avoided due to the lack of VVT support, but Holley supports it now and (I think) MegaSquirt as well.

Some drawbacks to the 2014 that you don't have with the 2008 if you use the OEM PCM is you will need to deal with getting SKIM removed and the need for a starter sense replicator. DIYHemi can turn a PCM into a crate motor PCM which removes both of those, but either way you will need to deal with both of those somehow.