6 vs. 7 on somewhat older models?

Where are we at these days with 6 vs. 7 on older devices like the hEX and older?

The hEX is actually a lot more powerful than a lot of older ones, being it has 256MB memory (but only 16MB storage), so I'm guessing that's going to be a resounding 7, but I'm more asking about the older ones with 64 or even 32MB memory. Oddly enough, the older ones usually have 64MB or more storage.

Anyway, thoughts?