Comparison of dv/v results from short and long period results

[Joel-Seism]

Hi, I am trying to compare dv/v results from long period (over 10 years) and short period (almost two years) for confirming whether they are similar.

If I run msnoise with long period data (10yr) and cut with same period of the two years,
I wonder whether the results will be exactly same.

I thought the ref_begin/ref_end and start/end are different, so dv/v with longer period would get more stable reference velocity.

Therefore, the dv/v from long/short periods will be similar but has a little bit difference.

I hope to confirm whether it makes sense?