To add my impressions. I really like the Contego. CPM M4 is a great hand use steel that is easy to work with and takes a killer edge. In the Contego it has thick blade stock but is profiled well to still be a great slicer. It is not corrosion resistant even against sweat while doing yard work but cleans up quickly and is well protection with its coating. The longer handle vs blade does have a benefit of a secure grip while choking back for extra reach. The jimping is impressive. The deep carry clip is great, and an improvement even over the triage (too weak). The stainless back spacer seems like overkill as it adds more weight then may be necessary. The carbide tip is an added bonus. The forward choil(?) is huge, provides for great security of grip but is a little too deep/large for me. The edges of the g10 on mine were too sharp also and needed filing.
I love the looks of the Rift and it does have nice handle vs. blade ration. Mine has liners that are too sharp at the edge. I do not like how the liners are solid, unskeletonized slabs. It makes the Rift seem too heavy for its size even compared to the heavier Contego. Out of the two, I was rather disappointed in the Rift (perhaps also due to the coloration of the multicolor g10 compared to what I was expecting from pictures). The Contego is one of my favorite Benchmade knives and seem to be a best buy. I am very surprised, considering all of the added design benefits and the premium steel, that the Contego only costs about as much as the Rift.