Your best bet might be to hold on to both and spend a few months behind the triggers of each gun. That way you have time to get to know the ins and outs of each rifle so you can make a well informed decision whether to sell one of them or keep them both. If bench rest shooting is your thing, then I'd imagine your going to find the RAW to be much more bench friendly than the Impact. Bull pups, are less than ideal when shooting off bags or a rest due to their shape. I have owned a 30 Bobact, 25 Wildcat, and 25 Impact so I speak from subjective experience.Of note, my .25 Impact was dead on between 60-70 yards but was hopeless at 100 yards. My 30 Bobcat was a extremely accurate out to 100 yards though the pellets would arc at that distance and you could literally see the pellets dropping onto the paper target which was bizarre. I was constantly struggling to keep the rear of the Bobcat from slipping forward off the rear rest which got old fast. The Wildcat was the worst of a rest as it was simply too light and I found it was better suited to shooting using a bi pod instead.
If EBR is your goal, then choose the rifle that shoots accurately and consistently at 75 and 100 yards. You have a long time to practice before the next EBR so have fun.