They are similar, but the URLs are not obfuscated. Do a couple searches with Duck Duck Go and then a couple with StartPage. After that check your browser history to see the difference.
The URL is passed visibly to the search provider even using HTTPS so any “bad actor” can tell what you are searching for.
You know, this is all well and good but it reminds me of the old joke about surviving a bear attack by being able to run faster than your partner. Most bad actors will go after the easy targets first. At least I hope that's the way it is.