It would be pretty hard to mess up a hackernews clone.
A HN clone SPA though...
First, let's see if they can get code splitting right to not make it loads 3mo/page.
Then if they can choose a stack that doesn't kill navigation.
Also, let's see how long it takes both team to come up with the same result.
My money is on the static stack. Just the registration without a good framework is plenty of fun.
Not that you can't make a SPA with an old school framework. But for some reason, SPA lovers will often go full nodejs as well, which is basically 1000 of libs you have to hand picks and fuse together.
I work on more and more SPA every day. It's always the same deal: the cost is higher, and it needs smarter devs.
Bottom line: do one when it has a good added value for your users.