I wouldn't sweat 0.6V difference. Matter of fact, I wouldn't sweat +/- 2V difference.

That said, it would likely be less expensive to purchase an 8 - 10 VDC wallwart of 200mA or more that already runs on your line voltage than to mess around with adaptors.

BTW - that one with the 100 - 240VAC input is a switching supply. They typically can handle that kind of wide input variance. You should also notice that it is much lighter in weight. But comparing analog linear supplies to them is not good to do, they have transformers inside that require a *much* tighter input voltage range.

--Mac