Yes, you are.
Controllers are optimised for different worklads and peak throughput is in most instances the most useless metric to go by. If you need to copy large data sets then fine but otherwise most workloads consists of many random reads and writes.
Another is the type of NAND flash memory used (SLC, MLC, TLC, 3D NAND etc. etc.), which roughly tells you how many times you can rewrite a block before it runs out of write cycles. Look for drive writes per day (DWPD) rating. It is the endurance of your drive. Higher capacity means higher write endurance.
The absolute cheapest NVME option today is the Intel 660p but it has a DRAM-less controller, so it might not be for you. 2TB for $220.
Remember that even the cheapest SSD is much, much faster compared to spinning, mechanical hard drives.