I've used both extensively for normal and macro. The Tiny Wildflower Macros gallery in my website link below will give you many examples.
I use the 35mm much more for full macro, partly because I fill with flash in AV mode and use f-22 to maximize DOF. The 35mm is possibly the most versatle prime lens on the market, with a detail that is hard to beat. You can shoot almost anything with it. However, it doesn't do infinity well, and the sweet spot (for normal shooting) is f-7.1. The stunning detail also works against you for portraits, unless your subject wants tiny wrinkles and bumps to show more clearly than with the naked eye.
I find myself using the 100mm macro at 100mm more and more, simply because of the way it renders: shoots as if it had a polorizer built in. It is so good, in fact, I often try to find ways to make it work when a different focal length makes more sense.
The last thing in my mind when I bought the 100mm was protraits, but I have discovered that the smooth and rich rendering of this lens and bokeh at f2.8 has made it my favorite portrait lens. Nice creamy skin tones makes even my wife look good.
However, since you seem also set on the 70mm (great lens as well), I would suggest you get the 35mm.
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