[mgmueller]

After 2 days of comparison:
Most of the times, I'll stick to the touch cover.

Very often, I'm using the Surface RT as a "normal" tablet.
Then I fold the covers back.
Both covers work flawlessly.
If you lay the tablet flat on a table and the cover is in front, typing works fine.
If you fold the cover back, more than 180° angle, the keys are blocked.
Meaning: When folded back, you can't by accident hit any keys.
Absolutely fine, just as intended.
BUT: I find it a bit awkward, having the tips of my fingers rest on the keys. You still can press them and it just feels a bit "strange".
On the touch keyboard, this doesn't matter, as you don't actually press the keys but kind of "hover" over them.

So: When traveling and/or only doing "light typing", I'll stick to the touch cover.
But I'll take the type cover with me all the time, in the very same sleeve.
When switching to "heavy typing", I can exchange the covers then.