I don't know, it shouldn't. You have to average for 7-10 days for a meaningful comparison. If you provide some concrete data, I'll try to look into it.
Generally, PPLNS has higher variation than FFPS (see e.g. https://minebest.com/blog/pps-vs-fpps-vs-pplns-vs-pps-mining-pool-payouts-explained).
I've just computed the actual hash value (~39 sat/TH/day), and it's very close to the value reported by Braiins. I will include this number in the dashboard soon.