Product Management 101: What is user testing?
userpilot.com
userpilot.com
I wouldn't take "product management 101" advice from anyone who has so clearly missed the step of researching the competition when it comes to determining product-market fit.
That's a random product, not the all-knowing-industry-standard-magical-site you are making it out to be
As far as I'm concerned, neither of those approaches would give you much value