Looking at Amazon, all the bi-directional 2x1 HDMI passive switches look to be clones of only 2 designs: the one DJ has, and this one that I ordered.
https://www.amazon.com/gp/product/B01GPU84A6/?tag=neogaf0e-20
I just got this one because it was only $9.99, the cheapest at the time that was still fulfilled by Amazon. It's out-of-stock from my seller, now, though.
I don't know if the slider switch should be more or less reliable than the button one. I've read poor reviews for both saying how they worked fine at the beginning before going to shit over time. I'm not expecting high-quality out of these cheapo cookie-cutter devices. I just hope I get one of the good ones in the quality lottery.
As DJ said, these are simple pin-to-pin connections. So as long as the connections are clean and solid, they should support any HDMI spec, no matter what the description says.
I'll chime-in when I finally get everything set-up and hopefully working. I'll be using Monoprice certified premium cables for all 3 ports.