That's understandable. I can't help you with the weight differences, though. I ride 100% trail, and, like I said, weight is just as important to me as it would be to someone riding tracks, because the way I see it, the bike was designed and built to have as little excess weight as possible, but that assumes that the rider is racing it and is willing to pay for new radiators if they wad it up on occasion. So for me the braces are a must have no matter what the weight. I just happened upon the skid plate
that I bought and thought it was a good deal, plus the fact that it is carbon fiber and lightweight is a bonus. I like the way CF looks too, so that sealed the deal for me. Where I ride there are tons of BFR's (big f'ing rocks) that threaten my case so it is a necessity to have a skid/glide plate. Plus the plate has frame protection - it extends out to the edges of the frame and all the way up in front and back and is wide enough to protect against almost any impact. Those two things are the only major protective additions I will add to the bike, everything else is pretty much overkill in my book.