Welcome to BN
I do not find them similar, personally.
The Hermes has that prominent orange note and it's overdosed with synthetic wood notes (the Iso-e-super) so it has a sort of sparkly radiance to it. The Aramis is a bit more solid, with that wonderful and unique bergamot/geranium/patchouli combo that creates a luxurious pungency. I personally think that only vintage Tuscany is any good, the new stuff is a little too sharp for my tastes.
Why don't you get a sample of both & wear them for a few weeks before you decide on a full bottle? I don't think you can properly gauge the wearability of TdH from smelling the after shave balm though, you need to smell/wear the actual fragrance.