I don't think the Deltex would work as a scraper as the action is orbital. I have used both the Fein and the Deltex for sanding into tight places. I like the Deltex for most of those jobs, but sometimes i have had to get in just a little tighter space and have to go for the Fein multimaster. I have also used the MM for chipping off rust from places like truck frames. I could not do that with the Deltex. Once finished with chipping, I go back to the Deltex for the final sanding as it has MUCH BETTER dust collection. In fact, the MM has no DC. I think there is an attachment, but I don't have it.. If i were to limit myself to one or the other, (knowing that he who dies with the most tools WINS) I would keep the Deltex. I can do chipping with hand tools if necessary. Sanding by hand is a drag.
Tinker