Welcome to the conversation
@Wheedus
The more I read from people, the more we seem to get to two quite independent questions and only if you answer both of them do you end up with Brayden Preuss in your side.
1. Are either of Gawn or Grundy inherently bad picks in their own right? ie. Over-priced and to be avoided because there is no justifiable way they will maintain close to their 2020 average compared with other similarly priced players you might use as captain (of which there are only 6 priced more than Grundy, including Gawn). If yes to this, don't pick either/both of them and move to question 2
.
2. Can Brayden Preuss do what is needed to be a successful mid-priced cash cow? The bar for this seems to be an average of around 95+ by R10 to make 150k. If yes, slot him in. If no, find a different way to fill you ruck slots (Marshall at R2 to swap later when you upgrade into a top ruck seems like a good option).
When we look at the question of Gawn vs Preuss straight out it assumes both of the above: people have put forward lots of points as to why either one won't work, or why they both will.