I'm of the same opinion.
'Opinione' — o-pi-NIO-ne. Stress on the third syllable. 'Stessa' — STES-sa, double 's'.
Use in formal or semi-formal contexts when you want to align clearly with someone's view. Slightly more elevated than 'sono d'accordo' — suits meetings, presentations, and debates.
'Essere della stessa opinione' (to be of the same opinion) uses 'essere di' — 'essere' + preposition 'di' + noun. This structure is slightly more formal than 'sono d'accordo' and signals that you share the same intellectual position.
Condivido pienamente questa opinione.
I fully share this opinion.
'Pienamente' (fully) — intensifies the shared view. Used in professional endorsements.
Mi trovo completamente in accordo.
I find myself in complete agreement.
Reflective construction — 'trovarsi' (to find oneself) implies arriving at agreement through reflection
La pensiamo allo stesso modo.
We think the same way.
Mutual — 'pensiamo' (we think) makes it bilateral agreement
Italian professional culture increasingly recognises the tension between data ('i numeri') and human factors ('il fattore umano'). Management consulting language from the US has been absorbed but often challenged by Italian humanistic tradition that values 'la persona' alongside metrics.