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I would expect to see a difference in Longitudinal G-force more than any difference in ABS activation, or I guess more accurately I would expect to see ABS activation at a lower Long G threshold. The slip thresholds and targets for ABS are not very big, and are tuned to the stock tires. This is why some cars are super susceptible to "Ice Mode" and others are not, even when modified. It also means that when you change stuff, you may be using up a lot of that threshold so that when it does engage it's falsely detecting wheel slip because of the difference in wheel speed from diameter as opposed to wheel slip.
I work on the OEM side of things so I have a little more perspective on the capabilities (and limits) of the stock road-legal ABS systems. I've also experienced proper motorsport ABS and that's so far ahead of what we get to deal with on our street-based cars, it's astonishing.
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