On the cheap one the taps are cheap, rear sealing design that lets beer sit in them and go mouldy, or dry up completely and make the tap stick solid. They're also going to be chrome covered brass/copper, and the chrome tends to corrode and flake off. The tower itself is going to either be paper thin metal or part plastic.
For the bottom one the stainless steel Nukataps are very reliable (I've been using 5x on my keezer for 3 years now), and cool down quickly to help beer pour without foaming. The tower itself looks like a fairly solid stainless steel construction. The keg disconnects and john guest fittings being included is nice too as they're worth around £10 per tap too. I think you can probably
I actually think the price of the cheap one is pretty astonishing, the problem is that I think that every single bit of it is garbage, and you'll be replacing it with something more expensive within a year.
It's also telling that I can't find a single review of the cheap towers (well, I found a single 1 star review on Amazon that said it was horrific, but not why...), and that the only sellers are on ebay/Amazon/AliEx, rather than reputable homebrew sites like The Malt Miller, Brewkegtap etc.