I think it depends on the program honestly, especially the "in-house" benefits".

We've been having a furious debate in the SHF household over this.
So far I have planned/flown 7 TPAC through to Aug 31.

For myself, AA Emerald is already done for 2015 sitting at 98K and already putting elsewhere.
For myself, my valuation for EXP would be minimal 18K HKD, my 8 SWUs alone would go over that amount, and unlimited free award changes to boot. If I wasn't so worry about an impending AA devaluation, I would keep on crediting to AA instead spreading the love

And I haven't even put "parallel trading" 32kgx3 into the question, wonder how much bags of Ketchup Chips can I bring back LOL

For Mama SHF, it's reversed. She can go for Diamond (34K for 1st qualifying month), she has 3 more TPAC to go at minimum.
But I'm stopping her and going the JL Emerald route a la Kaka.
I just don't believe the hidden benefits or the 24 hr Guarantee Y is needed for her pattern. She's used the 72 hrs guarantee once in 5 years as Gold, but hey use the benefits for 1 ticket and get 3 op-ups LOL
In her case, longevity in JGC is better value at this stage

In any case, double status is indeed a #FirstWorldProblem