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There's not a lot of options on these single sided SPD pedals. I bought those Shimano ones knowing that I could potentially drill & tap to fit studs/pins which I haven't got around to doing. The filing has certainly helped, but they're still NOT that grippy! :)
I guess the caged ones you shared can also be filed to make more aggressive/grippy and then can bolt on a small plate to weight the pedals so that you can flip them easier to find the clipped/non-clipped side...
I find that this type of pedal is a lot grippier on the flat side. I can barely ride my one-sided pedals in the rain because there's so little grip.