Neuroblastoma differs from Wilm's tumor radiologically by all except
The following are the differentiating feature b/w Neuroblastoma & Wilm's tumor.

Calcification

There are foci of calcifications visible in neuroblastoma (about 85%) which are generally less common and less prominent in Wilm's tumor (less than 15%).

Intraspinal extension

The intraspinal extension is seen in neuroblastoma, not in Wilm's tumor.

Aorta & WC invasion

Wilm's tumor invades Aorta and IVC. Whereas Neuroblastoma does not invade these structures.

Location

Wilm's tumor and neuroblastom can be differentiated on location too. C.T. findings will confirm the intrarenal location of Wilm's. Whereas Neuroblastoma will be seen above the kidney pushing it downwards & outwards.

Crossing midline

Wilm's tumor
or are typically confined to one side of the abdomen, whereas neuroblastomas usually cross the midline.
Calcification
Aorta and IVC are not eroded but pushed aside
Same location
Intraspinal extension of tumor