Difference between rails P80 & DD12.2

I’m posting today because I have a curious question. What’s the difference between Avaies rails and P80 rails?

I like the DD12.19 designs and not much of the freema glocks but I have p80 parts already at home and was wondering if I can whip a build up real quick but noticed that P80 rails are ether to wide and not curved enough to sit on the shelf that the DD12.19 frames have or is there a way to convert the P80 rails to fit like filing them down or cutting off extra material