WinSAT is what generates the WEI scores. It also "tunes" the OS for SSD, if it detects one.
When you say that the new SSD acts "just like a HDD", what exactly do you mean by that? Strictly speaking, that is true, it's a SATA-interface persistent storage device that is sector-addressable just like a HDD is.
Is this your first SSD? Or are you cloning from a prior SSD? If you are already "used to" the performance of an SSD in this computer, then a newer SSD (especially a TLC-based one) is hardly going to be any faster.
Even an SSD may not be obviously faster than a fast HDD, for some tasks, especially if you are unconsciously limiting your I/O multi-tasking, due to years of dealing with a HDD that slows down if you "do too much" with it at a time.
One objective thing that made me glad I switched to SSDs, and a benchmark I run on new systems, is to download and install Malwarebytes (from
www.malwarebytes.org ), and run a scan on a freshly-installed OS.
A scan on an SSD system will complete in less than half the time that it takes with a HDD system, generally.