If you form a c-corp to buy another c-corp for less than the book value of the target's assets then I'd think there would be no gain and it's then worth it to do a "g" unilaterally so that you can depreciate the purchase price for the next 15 years (at least that's my understanding). I'm curious to hear the story of others whether they used g or h 10 election and what the end result was.