[Nikolas (Nik)]

I'm confused and not very mathematically technical so hopefully someone can answer this for me in laymans terms
I was looking at harmonic mounts and came across this comparison. They are made by Umi (could be any manufacturer really the brand is not important)

In terms of specifications the umi 17 vs the umi17se is the reduction ratio

(500:1 vs 400:1) the payload is identical etc.
Is there a reason or a benefit of one over the other? I have seen this on other mounts as well.