I'd buy personally the hedgedog just because its price it's reasonable, its clip doesn't kill cores, it's made of copper and finally, is't design has been proven to be practically the same as the alpha's one!!!!
For me, the hedgedog is the best socket cooler up to date with no doubt, 'cos time ago with the 'copper-boom' a lot of manufacturers used to design and manufacture a lot of copper heatsinks, but shockingly they underperformed high-class coolers, starting to expand a bad mood about this ones. Moreover the price was a lot higher that newer models, so people rejected copper heatsinks.
Why was this happening???? The Design!!!!
If by any way any person would made the same cooler on both metals version, the higher conductivitie of the copper would made the cooper model to outperform the aluminium model. So the problem did reside on the design. Copper models were done with much older and less eficcient designs, and that was the real trouble!!!
The difference between the hedgedog and the "other" copper coolers is just the use of the best cooler design and clip(the alpha's one) with the only change of the made it's made.
HEDGEDOG ROCKSSSSSSSSSSS!!!!!!!!!!!!!
That's just why you'll be able to see in all the benchmarks that hedgedog beats any other cooler!!!!!!
ENJOYYYYYYYYYYY!!!!!!!!!!!
PD: Be carefull with this cooler. Always remember it's made of copper and by the metal behaviour it's always much softer and easier to break, so be very carefull when you handle and install it!!!!