"Maybe but the D looks far more advanced on its hull design. Sleek and elegant. The D is also much larger than the G. I wonder if families are no longer allowed on starships? It looks like the G when it was the Titan had none.
The E-E didn't have families.
The implication was that the 2360's "families on board" experiment didn't stand the test of time, which to be fair makes sense. The only time we've ever heard of ships offloading civilians and non-essential personell prior to a dangerous situation was when the Odyssey offloaded their civvies and non-combat needed folks on DS9 prior to going to the Gamma Quadrant (good call too). It appears that Riker and Troi had Thad aboard the Titan even after his birth and into infancy though.
Yamato presumably had families on board when she was lost. Saratoga had families on board at Wolf 359, its safe to assume she wasn't alone in that.