Then you're being dishonest about both.
Star Citizen gets millions off a promise of a tech demo while this one has been built and released on what it actually promises. It gives you new story with the characters, the side characters are updated considerably, and with it being 40ish percent done, you really can't say that it's "overly ambitious" when the games own origins is that it was a way for DC to learn how to code.
No, the criticisms aren't the same nor the supposed defenses. That's just not looking at them holistically.
... are you... are you serious?
Star Citizen is often accused of feature creep, of having a design lead who is overly ambitious and who, while being inspired, needs to have someone to rein him in lest he get a little too wild with his plans. Think George Lucas driving the prequels into the ground because he didn't have someone to tell him "No, George, this won't work. Pull it back a little."
There is actual work being produced, just like there is actual work being produced here. Is it at a rate that satisfies the vast majority of people? No. It is not. But it is difficult to argue that all the time and effort (and thus money) is amounting to the sum all of jack squat? It is. Because something IS coming out of both production houses.
The crux of the issue, however, is "Is enough being done to JUSTIFY the vast expenditure being outlaid into both projects?" and that's where people start going back and forth.
Summertime Saga is a very big project, and it continues to grow beyond the scope of what it originally was presented as. More to the point, nobody seems at all interested in reining in the scope of that project but instead, the large number of people involved seem to think that continuing to throw more and more money at it will result in a complete and viable game being produced down the line.
Now here's the thing: I would very much like both things to succeed. But both need to be pulled back a bit. Streamlined. And revised for... let's say "practicality." What goals are actually feasible and can be accomplished in a "reasonable" amount of time? Because working with "indefinitely" as your timetable is - and has been - honking a lot of people off.