Complex sentence: The HS25EXR is identical to the HS30EXR except that it does not offer RAW support, and that it uses AA/NiMh batteries compared to the Lithium battery of the HS30.
Split into simpler sentences: The HS25EXR is identical to the HS30EXR except that it does not have RAW support. The second difference is the use of AA/NiMh batteries compared to the Lithium battery of the HS30.