Unfortunately that's not the same as VTT.
VTT would be more like "National Institute of Scientific Research"
It says its sign by this guy: https://www.vttresearch.com/en/news-and-ideas/petri-soderena...
He has an e-mail address and a phone number, I doubt that if the report is falsified it won't come out.
Well there's this press release they would publish a report: https://www.vttresearch.com/en/news-and-ideas/donut-lab-comm... with as author the same name on the digital signature "Petri Söderena" for Organisation "Teknologian tutkimuskeskus VTT" and the chain is attested by "DVV Organisational Certificates - G4E" which is on the EU/EEA trusted list: https://eidas.ec.europa.eu/efda/trust-services/browse/eidas/... (by name and key signature). Looks like a legit VTT document to me.