I currently have a Gemini 900 which is great and I have had a lot of fun riding it.
Can do everything reasonably well from downhill and 4X/BSX with jumping and high speed berms to general trail riding.
The Prophet looks really good and would give me more 'All Mountain' ability to climb faster, although I would never use the xc setting.
I am looking at getting a frame and swapping all the components from my Gemini, sherman breakout forks etc. I have read the thread that I would need to get the 4X frame to be able to use the forks.

Who can tell me the weight difference betwwen the two frames?
I am interested in the trade off between upgrading the rear shock(fox vanilla r) to a shock with a pedalling platform or buying the Prophet 4X frame.