First lets start with this: They're both great game series. Now when choosing one over the other, that can be a bit difficult.
Wizardry is fun, but the focus of it is based primarily on building characters and for slow, but tactical fights. Might and Magic is fun as well, but it focuses on exploration and fast fights with many monsters.
Wizardry focuses quite heavily on plot and your choices in it matter heavily, while Might and Magic is much more loose on plot and you rarely have an effect on it.
For me, observing from just a gameplay standpoint, I would definitely go with Might and Magic over Wizardry. The fast combat is easy for beginners and incredibly fun overall, with exploring being an absolute ball in the huge worlds of Might and Magic. Plus, Might and Magic has a ton of charm in each games, from clever humor to just knowing the game had a ton of love put into it. Wizardry's combat, while not showing up as much, can drag heavily. Sometimes it drags because of difficult battles, and other times, you're just waiting for monsters to die. There's not a lot to do in Wizardry when you're not fighting as well.
Both are great games, don't get me wrong. But I recommend Might and Magic over Wizardry. That little tricycle pic I would agree with, if Might and Magic was represented with a mountain bike instead, because you can't explore much with a tricycle.