I agree with Karin, there are basically two lines the FCi and KNPV lines of DS. I have a KNPV line Dutch Shepherd. The KNPV dogs are basically a mix of the Malinois and the Dutch Shepherd. I have some very experienced friends from Holland that are KNPV National Judges, they say that if a dog is fawn colored in a litter it is a Malinois, a brindle colored pup is a Dutch Shepherd. In the KNPV line dogs, malinois and Dutch Shepherds can come from the same litter.
I work a lot of GSD's, Malinois and Dutch Shepherds at work. I own GSD's and a Dutch Shepherd. As Karin stated, they are more reactive than a GSD. Speed, ehh my GSD was faster than most any Malinois I have seen. His recall was clocked at 32 mph, so speed is not a big factor for me. More reckless, yes a good Malinois or a Dutch Shepherd can be reckless when working. You need to monitor them for their own safety. The main difference that I see comparing Malinois to Dutch Shepherds is handler sensitivity. Many Malinois, especially the pedigreed ones can be very handler sensitive. Dutch Shepherds seem to be more "handler hard" and even more handler aggressive to unfair corrections. I think the handler sensitivity in some Malinois lines make them more manageable to a skilled handler and better for sport.
I like high drive dogs and have had GSD's with as much or more drive than any Malinois Patrol dog that I have seen. GSD's can be more clear headed and less frantic. Malinois and DS can definitely get frantic or hectic under stress and in drive. "Capping" or drive containment is very important with all working dogs, bit more so with a Malinois or DS.
Overall, for a strong handler a DS can be an excellent dog. I really like them as Patrol dogs, but they must be matched with a confident calm handler that appreciates them. A good DS is an excellent dog for Police or Military, even ou tier 1 teams. I also like Malinois and have some excellent ones in my unit, but they need to be handled and worked differently than a GSD.
I will say that it has been a lot of work with my brindle Malinois or Dutch Shepherd, but I am very happy with him. Not a dog for a novice handler and he is a full time job. But, that Brindle DS has impressed me more with his drive, hard surface tracking, building searches, obedience and bite work than any fawn colored Malinois that I ever seen. With that said, I wouldn't recommend him to a family or some one that doesn't have the experience working a quick and reactive dog. A pedigreed Malinois would be an easier and possibly better sport or family dog to own than a KNPV DS.
“Beware of false knowledge; it is more dangerous than ignorance”. George Bernard Shaw