As I said, I don't know which chips the Corsair Vengeance LP White use, so it's anyone's guess what performance they can deliver. If they used the same Micron D9PFJ chips, then it's very likely they would achieve a performance similar to the Kingston HyperX LoVo, as it's known these are very high performance chips.
Regarding your misgivings about Kingston quality compared to Corsair:
- these Kingston, as I said, use very high quality Micron chips, so there's no doubt whatsoever about their very high quality/performance;
- you can see from
http://ramlist.i4memory.com/ddr3/table.php that Kingston uses mostly Micron (USA) and Elpida (Japan, now part of Micron) chips while Corsair (and G.Skill as well) also uses many chips from smaller/less well known taiwanese producers like Powerchip, Nanya, ProMOS, i.e. essentially they buy from whoever sells them chips at a lower price that meet some minimum performance standards;
- you can see from
http://www.behardware.com/articles/881-4/components-returns-rates-7.html which is a study of the return rates of (supposedly) defective hardware components out of the thousands of components sold by a large french etailer, and which is probably the best public domain indicator available of the failure rates of hardware components, that the return rates of Corsair and G.Skill modules are around 3 to 4 times higher than those of Kingston for the last few years (that site publishes one such report every 6 months), so from those reports you know that Kingston and Crucial have way lower return rates than Corsair and G.Skill for several years now, and this is not one person's opinion/experience, this involves many thousands of modules sold!
Also, the Corsair Vengeance LP White (using unknown chips) are around 50 € here, while the Kingston HyperX LoVo (using Micron D9PFJ chips) are only 42 €, so my choice would be very clear: why pay a ~20% premium to get, at best, the same quality/performance?
