Depends what your nav is like darth. The distance difference is usually very little really but the nav gets harder.
Mine is shit, but i am fortunate that the other member of team pie is very good. I have also learnt that its about working together effectively e.g. cause i dont nav i try to do more for the team like doing the dibbing, making sure partner eating and drinking, looking out for others/right trod when partner is map reading. Admitedly that didnt happen too much on the OMM but not much happened for me on the OMM, worked very nicely for the Rab and SLMM.
Oh and we have begged and borrowed kit for the last three we did and regretted it, invest in some good kit to make sure you get a good nights kip. I would get a balloon bed, good sleeping bag. inflatable pilow, earplugs, immodium (another nasty lesson from the OMM!) and most importantly some pie for overnight camp.
And enjoy!