yukapuka :
the realist is that they are both same, the h110 is newer though, but does the same thing
so if you want to be up to date with the latest technology then go for the h110 otherwise the h100i is just as good
also on the website corsair claims that the piping in the h110 is better than the others, or the best they got to offer so perhaps that could tip the scales
Wow ... we woke up an old one .... but no, they are not nearly the same.
-H100i i s 2 x 120mm / H110 has 35% more surface area 2 x 140mm
-H100i uses 2700 rpm 120mm fans / H110 uses 1500rpm 140mm quiet fans
-H100i produces sound levels > 60 dbA / H110 is as quiet as a Noctua at about 39 dBA ... that's < 1/4 as loud.
One good thing about the thread resurfacing is that the Swiftech H220-X (wide availability expected August 31) makes all AIOs (Corsair / Asetek's / NZXT, whatever) completely irrelevant:
-It thermally outperforms every other AIO made
-It does so at 20 dbA below the current AIO "champs" ... (again that's 1/4 as loud)
-Its copper not aluminum
-It's not a CLC (Closed loop Cooler), you can "open the loop" and add more water blocks
-It has a powerful pump which allows you to add water blocks for MoBo, GPus, RAM, whatever, if you'll excuse the pun, "floats ya boat".
-It's actually quite aesthetically pleasing
-You can monitor coolant
-Reviews are universally 'glowing"
http://www.swiftech.com/H220-X.aspx#tab5