Running multiple things can increase effect, for same total milligrams and similar potency of compounds, where the compounds work synergistically. This happens when two or more compound are somewhat lacking in some activities and each fills the other's gap.
In your first example, trenbolone needs the testosterone as does the Deca (Dianabol or Anadrol would be other ways of filling the gap -- EQ may also do so to some extent as judged by a number of cases but I have not tested that specifically.)
Neither cycle is particularly if at all strategized: they seem kind of random.
Compared to the first, the second cycle adds 600 mg/week testosterone enanthate (big change) and 100 mg/week Deca (near trivial), but takes away 200 mg of trenbolone enanthate (big change though not quite as much as with the testosterone) and drops 200 mg EQ (moderate change.)
Hard to call it between these two: the reason for why they might be pretty comparable despite lower dosage of the first is that trenbolone is unusually potent, so that 800 mg/week cycle acts more like a gram per week cycle.
Why do you have Deca in there? It has no special anabolic properties and has specific serious disadvantages.