The "retro" version from Joshua is very nice. The only thing missing from that one is the front rehaut thickness. But compared to this Silix version it's much better (imho).
With some mods the Noob factory version is the best one out there, hands down. But like I said, it requires modifications... and it's extremely difficult rep model to find. I think TTK can source it though.
If you want the best one, there's no comparison, really. The dial is superb. Left: rep, right: gen.
Besides the dial this version has correct case dimensions, superb rehaut & thickness and very good SELs.
Here's my modded one (new sharp edged bezel, new insert, cg's modded):
Search for Stephane's review of his correct hand stack version with genuine dial. Can't get better than that, really.