There is no fundamental differences between regular ESC or blheli, blheli_s or blheli32 as the all use MOSFETs Townsend voltage to brushless motors in a specific timings.
However has @Luca said, the difference is software. With the latest and greatest being blheli 32. But the primary focus of developers recently is the fpv racing scene where update speed is everything and for high kv motors. So there are a bunch of custom protocols like Dshot, oneshot and multiahot that send updates crazy fast to the motors.
But they should still work fine for your motors, you might modify the settings to work well. The best thing I like about the Blheli32 ESC is that you can set current/voltage limiting so your ESC should never fry or overheat which is a massive safety feature.
As for your issue you said one has failed, could you let me know what problem you had so we can try look into this as I am innregular contact with the designer of the wraith32 esc's
PS: thanks Luca for your kind works but i have come a long way but I still feel like i know nothing! but try to help where I can!