With Lexus being part of Toyota and Toyota having a stake in Suzuki then it's effectively 1 = Toyota group, 2 = Honda. However, being part of a group doesn't necessarily confer consistent reliability. For VW group in the same table Skoda is at 12, VW at 20, Seat at 21 and Audi at 26 while Mini is at 5 but BMW at 19. Nissan is at 25, behind Renault at 23.
Regarding drivetrain types it's useful to read the supporting comments. Hybrids rank highly because almost all are Toyota. The hybrid Mk 2 Jazz didn't get a mention although previous surveys have put that vehicle at the top of the reliability table for individual vehicles (but actual numbers sold here are relatively few). The BEV ranking is dragged down by Tesla which is only one slot above Land Rover in the manufacturer table. However, it's Tesla's questionable build quality which is the problem with no mention of drivetrain issues so BEVs from manufacturer with good attention to quality might well eat into Tesla's sales. History might well record Tesla as kick-starting the trend towards BEVs with good range but may not be the ultimate beneficiary.