I haven't put my hands on Poser yet, but the difference are quite a few.
Lifeforms 3.0 and the 3.0 studio is that Life Forms 3.0 and Life Forms
Studio 3.0 both have a number of new features including rendering, inverse
kenematics,and range editing. However, Life
Forms Studio also has additional plug-ins and includes the PowerMoves 1 and
2 animation library CD. PowerMoves 1 and 2 - PowerMoves1 is a animation
library of 600+ sequences,
PowerMoves2 has 5+ new Life Forms ready models, and 120+ new mocap sequences.
The main difference in the import and export plug-ins included with each
package is that the Studio version supports motion capture import and
export via BioVision and Acclaim file formats. It also includes VRML 2.0
export and plug-ins for exchanging model geometry with ElectricImage namely
FACT import and DXF export.
The following lists the plug-ins included in each product:
1. Life Forms 3.0: infini-D in, infini-D out, 3DS R4 in, 3DS R4
plugin for 3DS R4, 3DS Keyscripter, BVA out, VRML IN (only IN),
SWIVEL3D IN, SWIVEL3D OUT, E3D OUT (Tracks), .SEQ IN, .SEQ OUT
2. Life Forms Studio 3.0: All plug-ins in Life Forms 3.0 plug FACT IN, BVH
out, BVH in, Acclaim in,
Acclaim out, OBM out, VRML 2.0 out, DXF out