The HK is a knockoff of the Hakko without a tempeture readout. It's adjustable and all the Hakko tips fit it.
I bought a large chisel tip for Deans and a smt tip for fine work.
I own $150-$200 brand name irons but actually used it for all my mods until I upgraded to a smt hot air station.
This is what I use now but I still use the HK at the rc field on a 12v to 120v inverter.
My typical 9X telemetry, backlight, haptic mods before soldering on the USBasp programming cable.
To me the iron is the same on both.
Again, soldering with any iron requires practice and a good assortment of tips, $15 or $200 won't change that.
I'm not interested but I'm wondering why someone isn't modifying the spare 9xr boards for telemetry on a board exchange +$ price and making a business out out of it?
Probably both boards and a DJT module needs to be done to make it a PNP kit.
I owned 2 SP ver 2.1 boards still that I modified for Frsky telemetry and HK BL control to press them into service for locals. They work well and were before the EZ board.
In any case, I'd recommend this iron as a first one to buy if your on a budget and need an OK iron. Of course the real Hakko at $100 is nice also.