I would use the 51075 for both after looking at the micron ratings but you can use the other.

For example

bd7028 23 nominal 45 absolute 98.9 efficient at 45 microns and 50% at 23 microns
BD28 12 nominal 25 absolute 98.9 efficient at 25 microns and 50% efficient at 12 microns.

51675 98% efficient *25 microns and 50% *19 microns
51067 98% efficient *40 microns abd 50% *30 microns

BD28 is a better filter just like the 51675 is a better filter. I would actually skip the 51067 because that's actually a pretty non impressive rating.