SeatGuru, which for over twenty years has been cited by frequent travelers and other sites as a ‘best tool’ to pick good airline seats and avoid bad ones, appears to have stumbled badly in recent years, with maps that are often out-of-date. There are reports that the site has not been updated for over a year.
Recent personal experience has twice shown issues like that, once on a Level/Iberia flight to Spain that misidentified premium economy seats as business, and just this month with a completely wrong layout for a Finnair A330-300.
The title image above is from AeroLopa, a site recently recommended by expert flyers on several online groups. Note the number gap between Rows 23 and 31, and that 31L is a front-row-of-section seat (extra charge, but lots of footroom!).
In the SeatGuru chart below, the number gap is between 10 and 21, and 31L is an ordinary seat at the back of its section. Finnair has two layouts for the A330-300, and this is neither of them!
SeatGuru, originally independent and then bought by TripAdvisor which was in turn bought by Expedia and then spun off, still has one feature lacking in AeroLopa: detailed assessments of pros and cons of particular seats and what obstacles or obstructions might be encountered. But given the chance of an inaccurate map, the value of that assessment is questionable.