Resin holds detail significantly better, this is a fact. Go and check out some Kromlech figures for a good example.You imply that resin should cost more than plastic which on a raw material cost is probably true but resin mini's are also considerably cheaper to make the masters for as they can be 3d printed or cast/cut from cheaper materials. A single cut master will create lots of silicone molds. A plastic injection process requires a huge investment to create the die as it needs to last.
I also disagree that resin holds detail better than plastic. I have yet to see a single resin hold the fine line detail that plastic can. Sharp edges in resin just don't happen as they soften in the molds. There are also a lot more issues with bent pieces, air bubbles and gap filling that just isn't needed in a well designed plastic model.
As an ex-Tau player I found all their new releases great. They fitted the fluff, following a single design ethos and were great to put together.
Looking at your example of Twisted, their models are £15 each plus shipping. That is a similar price but at a much lower volume of scale and with cheaper manufacturing processes. They have not designed or costed to create those in the thousands and on a continuous basis. I also don't think there is any more detail in those miniatures than a GW one and that is despite them having a larger scale to use. I also guarantee that when that resin model arrives it will need work to make it fit and repair that a plastic model just wouldn't.
Injection moulding has come on significantly, but the issues are still there due to how they're made. You need a mould that can cleanly split without under cuts. This hurts complex details across multiple planes.
![SteamTank02.jpg](http://i1278.photobucket.com/albums/y515/spoffle/SteamTank02.jpg)
![tank4__sized.jpg](http://i1278.photobucket.com/albums/y515/spoffle/tank4__sized.jpg)
Can you tell which one is plastic?