Beck has essentially been mentored by Anae. He has no major college football coordinator experience, and only one year in the role at all. He seems bright, energetic, and full of promise.
Long is basically the Professor Emeritus of the 3-3-5 we've been running. He has major coordinator experience, and head coaching experience. But his last gig was at a last place mid-major. He's replacing a young, well-respected, coordinator on the rise, who has consistently moved up through the coaching ranks and was mentored by Long.
Beck and Long could ultimately both be upgrades, but it is a logically fallacy to think that both Beck and Long will be better. Both are in mentor/mentee situations. You are either holding out for youthful exuberance or venerable experience -you can't have both (unless you are an Orange homer [which we all are]).