Ah yes, they do look very different, design-wise.

The E70 boots look narrower though, are the E53 joints bigger around? These might not fit. Or it might just be the angle of the photos.

The material looks to be different too, the E70 is shinier and looks almost plastic. The Febi E53 boot I recently installed was like this and I feel it's a better material.

It's only been a few k miles since install though so I am keeping an eye on it to see how long it will last compared to the previous ones, which IIRC were GKN boots that look like the pic above (soft matter rubber)

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04 X5 3.0i auto
03 X5 4.6is