Wellgo have been around for a very long time, and like many other large asian manufacturers (pretty sure they are asian) they make a lot of product for other people. I had some wellgo pedals on my MTB many years ago, they kept going dispite the appearance of them degrading after a decade.
They were replaced when my gf started riding my old MTB to work. Changed to low level shimano pedals. She couldn't figure out the engagement of the oooold wellgo's, but never looked back with the replacement shimanos.
Hard to compare a 10+ yo design to something newer, but wellgo's have never been top notch, but rather entry or value. I'd recommend getting a cheaper set of shimanos. Similar cost and weight most likely, but the shimanos will perform just that bit better.