Lateral move, not worth the effort to go from DT to GE.
But, when I made my purchase, I did choose GE over DT. I own the GE T2, and I also own a set of the DT SM350.
You didn't say what GE, but since you are comparing to the DT, I would assume it is a T2 or one of the powered "sub" models.
The GE does have a better tweeter, IMO. And is very likely to have better imaging since the DT has the rear-firing drivers.
Also, note that the DT will likely be more challenging to get the placement dialed in, and will need to be further out from the wall.