I wanted to do a comparison between recast and legitimate JID girls from Iplehouse. For those who don't know, JID are the 42cm-sized range from Iplehouse. The sculpts currently available as recast in the JID line that I am aware of are: Asa, Tatiana, Benny, Daniel, Jerome.
(Don't contact me about buying them, and I don't own recast JIDs.)
Since I don't own my own recast JID, a friend over at
AtticFlowers has graciously taken some photos of her recast girl, Kourin, a JID Asa.
Our Guests:
(legit)
And Kourin:

(recast)
Here are some pictures of the recast girl. Where applicable I will provide pics of the legitimate girl or give my commentary.
AtticFlowers says her recast girl has a tendency to fall out of joint a lot. This does happen with my legitimate girl, but only when she is strung loosely. Once she's strung super tight (which is hard to by yourself) and with thicker elastic (I use a thickness best suited for SDs because she is so heavy), my legitimate girl doesn't have this issue.
Here the body overview of both dolls. The recast is on the left of the screen, the legitimate on the right. As you can see, both dolls' joints are very flush.

(recast)

(legit)
AtticFlowers says she, "sanded out most of her [the recast girl's] seam lines. They were BAD, and the sanding done by the recaster was sub par. You can see where the aggressive sanding by the recaster left a gap in the shoulder, the drill hole was also partly to blame."

(both pics are of the recast girl)
The legitimate girl does have some obvious seam lines, mostly on the back of her legs, but nothing too major.
The head cap seems to fit very well on the recast. Note that it does not have an Iplehouse plate in the back, where the legitimate does. Note the sticker on the Legit girl's head. It is thick, blue, and slightly domed rather than a flat, matte sticker.

(recast)

(legit)
Here is the inside of the headcaps. Both headcaps have the JID mark inside, but where the legit girl has a serial number (I assume this is for the sculpt, not the specific doll), the recast just has the doll name.

(legit, placeholder pic until I can get a better one)
Important note: If someone knows if other legit JID sculpts contain names rather than serial numbers, please let me know. I could not find any information on this. It is possible that some legits just have names as well, rather than serial numbers like the Tania sculpt has.

(recast)
In this recast, the string channels are actually drilled really well.

(both pics recast)
Yet, the insides of the recast remain messy. Legit insides generally do not like look this, and do not look like this in my legitimate girl.

(recast)
AtticFlowers says, "The C shaped pieces on the wrists are very fragile. This one was miscast slightly and broke when I tried to fix it. It's actually in two pieces, but stays in place well. Gluing didn't help, as its a high stress area."

(both pics recast)

(legit)
The legit girl lost her wrist pieces long ago. >.<
Well I hope this helps! As always, don't judge a second hand doll as a recast too quickly, do your homework and shop safe!
Oh and be sure to check out my friend's tumblr, Flowers in the Attic,
here!
Happy collecting!