Is an expensive tarp worth it? That's a question only you can answer for yourself since it's about your taste and priorities.
The tarps you listed are completely different from each other.
The DD is a 300cm x 300cm rectangular tarp and made from 190T polyester with a PU coating. It has 19 tie-outs and can be set up in lots of different configurations. It's not really hammock-specific, and it won't work well with the 11' / 335cm hammocks most people use on HF.
The Wilderness Logics Tadpole tarp (also sold by Dutch) is a hex tarp made from 1.2oz silnylon. It's made specifically for use with 10'-11' hammocks, that's why the ridgeline length is 11' (335cm). It is very narrow to save weight - that's why it doesn't provide a lot of coverage. While some use it even in winter, it really is a summer or 3-season tarp.
The Warbonnet Superfly is a 4-season tarp made from either 20D silpoly or 30D silnylon / silpoly. It's a hammock tarp, too. However, it is a proper winter tarp with doors, and it's very wide.
The price reflects the cost and amount of the material used as well as the manufacturing location. Heavy PU-coated polyester is cheap, and the DD-tarp is probably NOT made in the UK but in China or some other place were labor is cheap. Lightweight silnylon or silpoly is more expensive, and both Wilderness Logics as well as Warbonnet gear is made in the US.
So you have to decide
- how important weight is to you,
- how much coverage you need (which depends on the size of your hammock as well as the weather you want to camp in),
- if you want to use your tarp only with hammocks,
- and which working conditions you want to support.
For what it's worth: I have never heard anyone complaining about their tarp being too high quality, but I have seen many people being unhappy with an unsuitable tarp.
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