There are features to the latest round of Phicen base bodies (the S07, S08, and S09 models) which make me dub them the "5.1" release, vs. the first v5.0/stainless steel skeleton bodies. Unfortunately, this does require a bit of a Parental Advisory sticker: doll nudity ahoy!
Click any photo to get larger versions on Flickr.

Phicen v4 vs. v5.1 Body Comparison by edwicks_toybox, on Flickr
I'm breaking my usual "no full-frontal doll nudity" rule to truly show the differences between the v5.1 body and earlier versions. The pre-blushed v5.1 body means you'll get slightly better looking nipples if you go topless.

Phicen v4 vs. v5.1 Body Comparison by edwicks_toybox, on Flickr
The major sculpting difference between the v5.1 body and all the older ones comes between her legs. I'm not sure who was asking for this feature, but if you were, I think you'll be happy with the result. It's a feature that I have no use for, though.

Phicen v4 vs. v5.1 Body Comparison by edwicks_toybox, on Flickr
One nice, clinical close-up for those who really wanted to know (and not something I plan on doing again any time soon). The scultping is definitely TMI for the shoots I do, but the anatomical detail isn't so obtrusive that it'll peek out accidentally.
Click any photo to get larger versions on Flickr.

Phicen v4 vs. v5.1 Body Comparison by edwicks_toybox, on Flickr
I'm breaking my usual "no full-frontal doll nudity" rule to truly show the differences between the v5.1 body and earlier versions. The pre-blushed v5.1 body means you'll get slightly better looking nipples if you go topless.

Phicen v4 vs. v5.1 Body Comparison by edwicks_toybox, on Flickr
The major sculpting difference between the v5.1 body and all the older ones comes between her legs. I'm not sure who was asking for this feature, but if you were, I think you'll be happy with the result. It's a feature that I have no use for, though.

Phicen v4 vs. v5.1 Body Comparison by edwicks_toybox, on Flickr
One nice, clinical close-up for those who really wanted to know (and not something I plan on doing again any time soon). The scultping is definitely TMI for the shoots I do, but the anatomical detail isn't so obtrusive that it'll peek out accidentally.