It's a tough call for me, as there are aspects I like from each company.

I prefer the case materials from hobbywing, though I prefer the variable fan speeds with tekin.

I like the soldering terminals from hobbywing, but hate the high temp solder they use on the pre-soldered leads.

I like the Hotwire programming from tekin, but hate that I have to unplug the fan each time I connect.

In the end, it all comes down to personal preference. I ended up sticking with hobbywing, but mainly because I use them in my planes and helis as well, and can use the same programmer for all of them.