% of sessions that visit page varies - segment vs filter
I hope you are well.
I am trying to figure out what percentage of sessions on my site visit a type of page that I have grouped using a regular expression.
If I use a segment saying page matches regular expression A I get 48% of sessions whereas if I create a custom report that brings sessions by page and the page matches regular expression A through a filter, I get 36% of sessions.
I know that segments and filters sometimes bring different results but in this case I'd have thought they wouldn't. Why are results different in this case? How would I interpret both numbers?
I think I should go with the segment but can anyone confirm this is right, please?
Thanks and best regards, A.