Tom:
There are at least two kinds of Persil Megaperls from Henkel, Germany: there is one for colors and one for whites (or Universal). There may be more, I have not kept current.
The one offered in US was a slightly different formula -- the Universal formula from Germany (whether in megaperls or powder) has enzymes that are more sensitive to very hot water, because most washers in Europe will start with either cold or at most warm water, then heat up to temp, and hot-wash enzymes are more expensive. The American version had enzymes that seem to work just fine in toploaders and washers that fill with 140F water. Also, I've never had trouble with the european version bleaching spots on colored clothing, but the American version seems to have some more aggressive bleaching activator, so when I tried using it on colored clothing it bleached spots wherever the perls touched wet clothing before the washer had finished filling. I don't know if that was fixed in later formulas, that was my experience with my first (and only) bottle of Persil PowerPearls w/ Pro-White Technology here.
That having been said, it was a good detergent, I'd buy more if they improve the formula.
Despite all this talk of it being discontinued, I'm waiting to see what they'll do: all the other American Persil formulas got a "Pro 10 Dimensions of Clean" label with items one can take with varying degrees of seriousness. Either way, it makes sense they'll clean the pipelines and introduce a new formula with similar characteristics for the PowerPearls -- the liquids and pods clean well, but some people need the "powdered"/pearls, why give that market to P&G?
On the other hand, even P&G is trying to get rid of powdered anything, so who knows?