They'll be a bit different but both will gain in the belly area, thighs, face etc. With Haruka having bigger breasts, at least initially :)
Thanks for the answer, I would have found it sad if both of them have the exact same body at the end (I hope to see one with a bigger chest than the other in the end). Does some wg stages are present in the demo or is it purely a prologue?
The demo has them at first stage as in the screenshots. I will likely add one chapter (meaning a wg stage for both) at a time.