I can't say for sure... internet opinions can only go so far. Everyone has a different idea of what a 'secure' footing feels like, so there's experimentation to be made to attain a good match between pedal and shoe. Maybe a preferred pedal shape has low grip and might require a softer gummier shoe sole. Or perhaps a beloved pedal has too much bite (very high metal pins) which might require a harder rubber sole compound (no to mention shin guards ?). Both scenarios could end up giving the same feel... hard to say for sure. I know guys that won't even give any of this a second thought, and can ride well with whatever they're wearing on top of busted flat pedals with several pins missing.
Same thing with big wide feet against small pedals, or small feet landing on extra wide flat pedals where some pins never make contact. There's a happy medium that would matter for some of us, but not necessarily for others. But if you can find a good combination that would help you get better used to riding flats, then that's progress.
Personally, I don't like shoe sole patterns that have large coin sized knobs surrounded by large gaps because some of the pedal pins will land on rubber and some will land on nothing. For me this is annoying because I never feel sure-footed. On the other hand, I don't like soles that are completely (or nearly) smooth without any pattern at all - because we have to walk on the dirt eventually, or even push our bikes uphill from an off. Shoes with no waffle pattern of any sort can't grab onto the ground - especially when things get a bit muddy.
You'd save a lot of money if you have riding mates that use various types of flat pedals... that's if they let you ride their bikes around the parking lot a bit. Otherwise you could end up with a box full of pedals like me. I've given them away to family and friends who bought new bikes to replace the cheapo pedals they usually come with.