Lusty,
The information researched cannot possibly be outdated since it has not been proved wrong, or added up to.
Old, yes, but not outdated.
You can run both modules on the same machine.
It is unnecessary to have experience with the T2682 in particular to know both modules will work together.
It is a rule of thumb regarding memory. Modules using the same technology will work together at the JEDEC standard. If they do not, one of them has a problem or an incompatibility with you motherboard.
So, outlw6669's answer fits your question perfectly.
In any case, I have installed and paired memory modules with differing clocks successfully in a couple of netburst Celerons a few years ago.
Regards.