If the big squishy one was comfortable, I’d just put it back on and ignore the squeaking from it, and if you start going on rides that are long enough for it to become uncomfortable, then think about swapping it. It takes some time riding for your body to get used to sitting on a saddle, and if your body isn’t used to sitting on a saddle, then a hard narrow saddle is going to suck, even if it is otherwise a good fit for your body.

When picking a new saddle, the most important thing is to get something that is the correct width for your sit bones. Many bike shops have devices to measure this. Your position on the bike also influences the type of saddle that will work best for you. If you ride a road bike with a leaned forward, aggressive position, a saddle that is a bit more narrow with less padding can be more comfortable over long distances, as long as it fits your body well. For more upright bikes, a slightly wider saddle with a tiny bit more padding often works better. Saddles with a ton of padding can often be uncomfortable for rides more than a few miles, as they can put pressure on the soft tissue between your sit bones. Finding the right saddle can take a few tries, but it is worth it. Cycling shorts also help a ton.

The saddle in the article is not what I would start with. Designs like this can result in less control of the bike due to the saddle not having a nose. There are a few people who find that a saddle like this works well for them, but there is a reason they are not widely used.