I will try to take a photo of my pair sometime to show you how they have stood up to years of mtn bike spd shoe use. I would say that I have always been careful of rough surfaces and or taking them off so not to wear them out. The mec ones are however a rather tough material, most likely heavier than the others shown.
They are pretty tough wearing, and with common sense have held up well over the years, which really has been well over 10 yrs. I do use them often in spring and fall, for wind cutting for cold when it gets below perhaps 6 or 7c. For 2 or 3c and less, I stick some old fleece over the top of my shoe for insulation before putting on rain booties.

For me, good rain booties are an extremely useful thing to own to help with riding comfort, wet or dry.

Ps, just so you know, I commute a lot, so they do get walked on regularly.