Hi @bbildman, It will work with a windows abstraction layer for 32bits apps, WoW64, while Opera itself will use less RAM and loading time into memory will also be faster. I always prefer to use 32bits applications where ever possible.
The shortest reasoning is that most running processes don't require addressing more than 4Gb of Ram and the cost of doing it is to double the size of every single variable at programming level, which is quite expensive for things like "hypertext processing".
Have a nice day