The PC Engine was actually an 8 bit console, but was almost a match for the megadrive in terms of graphics. I’ve still got a handheld one and very much enjoy Splatterhouse and PC Kid 2.
For me the ultimate 16 bit console is a Super Famicom or US SNES, running at 60hz through an RGB cable, giving a much clear picture, no screen borders and about 15% faster gameplay compared to a UK SNES.
Favourite games were Castlevania 4, Contra Spirits, Axeley, Super Street Fighter II, Dracula X, Area 88, Geoman Ninja and Super Mario 4.
Although Super Shinobi, Eswat, Steel Empire and Strider were all very good on the Megadrive