318 LA roller block questions

And third thing... Is there an advantage to 1.6 ratio over 1.5 other than a little more lift? I don't get why people go 1.6 when doing a build if you are just going to order a cam anyway, why not get the cam with the lift you want to start with? This is just more of a curiosity that i might be missing something with 1.6.
Just adding more lift to the cam directly can cause too fast of ramps, main reason people go with roller cams can go with faster ramps and more lift.