I have the Delica 4 FFG and the Mini Grip 556. I like the Delica better in every regard except for the lock, not to say the Delica has a bad lock because it doesn't but imo the axis lock wins most all the time. I have many knives that I carry for EDC but I always end up going back to the Delica as my "go to EDC". Like someone else said it may be the perfect EDC. Just my 2c and have never used or owned a RAT (though I've heard good things) so I can't comment on that but I can't imagine any AUS-8 outperforming Spyderco VG-10 in any aspect but the price is reflective of that and I'm sure Ontario AUS-8 is just fine for nearly any task you'd throw at it.