Fellow cmdrs,
Following on from a promise to show pics in an earlier couple of posts, I'm going to present you all the evidence and hopefully demonstrate to everyone's satisfaction that the ships from the encounters and the crash sites are of the same type. (Though given how long it's taken to pull it all together, the matter's probably already been put to bed in the meantime!)
Exhibit A - The Wings/Petals
As can be seen from the encounters, there are two parts to the Wings/Petals:
Compare the part on the underside (images above are looking from the underside) with the following from the crash site:
Now look at the topside from the encounters:
And compare to the following from the crash:
Also take a look at the following images of the main body/hull of the ship from the crash site, where the attachments points of the upper wings/petals can be seen, along with where the point of one of the wings has been forced through the hull in the crash and what looks like a small attachment point:
The small attachment point would match the shape of the inner tip of the lower petal/wing, and is likely where it attaches to the body/hull.
Exhibit B - The underside of the ship (Tendrils and other parts):
There are two distinct sets of parts on the underside of the ships from the encounters, the parts that resemble tendrils and the parts which are at an angle between the tendrils and the petals/wings (the latter set contain what appear to be the thrusters)
These can be seen in the videos, the first image in this post, and the following:
For the set that contain the thrusters, compare these to the following from the crash site:
Different parts of the section are buried or missing in the two images above and I've had to flip one for ease of comparison, but the overall structure/shape of the section should be clear when comparing the two.
For the tendrils, compare these to the following from the crash site:
And, for completeness, the underside of the hull/body at the crash site (the side that's facing up), considering in particular the 8 areas which might be attachment points for the tendrils or thruster sections, and the various octagons and the various other general 8-fold symmetries:
Exhibit C - Size
See the below:
As you can see, the hull/body at the crash site is in the order of the size of an Anaconda (maybe two thirds the size). With the petals/wings all attached, the crashed ship would be much bigger than an Anaconda.
That concludes the evidence and my case is now over to you all for consideration. (Or probably over to you all to tell me I've been ninja'd!

)