See here for info:
PIN/contactless debit transactions go through VISA/MC here and they definitely cost less, see below.
However, not 100% sure about remote online/web transactions - most of those providers here are "contact for pricing", but e.g. BlueCommerce and Checkout.fi seem to have a single rate for card payments - though it could be the difference is just "averaged out" (like e.g. iZettle does for card-present EMV transactions: 1.95% for all cards).
Couldn't find an up-to-date English price list for Nets Finland, but here is a 2017 one in Finnish: https://ttlsystems.fi/wp-content/uploads/2017/10/SME_Hinnast...
Base rates: VISA Debit 0.41%, VISA Credit 0.91%, MC Debit 0.42%, MC Credit 0.92%. Additionally +0.04€ per transaction.
Remote transaction: +0.30%, foreign EU +0.10%, foreign non-EU +1.30%, corporate card +0.80%.
SumUp Finland: https://sumup.fi/maksupaate-hinta/
0.95% VISA/MC Debit, 2.75% credit cards.