soft wheels?

:
07 F150 HD
I am looking into buying some mille miglia evo5s and i think i have seen in a cple places online, maybe messageboards or something, that these wheels are "soft"?

what makes them soft?
and what does soft mean? does this mean the rim will bend easily, or that it will chip/ding easily?

Is it brand specific or is it soft because of its composition or something?

the only pair of wheels i have ever owned were SSR Integrals which are, or so i hear, really light and strong (cuz they are forged)

have I been spoiled? Are any non-forged wheels going to not hold up as well in my day to day driving?

thanks for the tips
 
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