The A60 seems to have a slightly longer depth of field (13.6mm vs. 12mm) at the same working distance, and the S9i has more than double the available magnification (no point for soldering work, but could be useful for small feature inspection). Then there's the trinocular port/integrated camera, which I would consider a must have for a general purpose inspection scope (rather than an assembly line one), but you can buy an eyepiece adapter and just put a camera in one eyepiece, so it's not impossible to get the feature on the A60. The apochromatic lenses will be more highly corrected, but I wouldn't expect big differences in quality between either - you'd probably have to see for yourself, but I'd expect both to look good.
You could consider a stereo scope from a reputable refurbisher/reseller on the used market, there are quite a number of older product lines which will have nearly identical features and quality, but which may have a trinocular port or other feature that you'd have to step the price for in the current model range. Most good microscopes could easily last decades and would still be quite competitive with any current offering, so looking into availability of older models could save you some price and get you the featureset you're after - it's at least worth a look.