Thoughts on White Kidney Bean extract (an alpha-amylase inhibitor)? How does it compare to/interact with acarbose (an alpha-glucosidase inhibitor)?

I used to think that White kidney bean is like a supplement form of acarbose, but on researching today, I realized that they actually work on different pathways. White kidney bean extract contains an alpha-amylase inhibitor, while acarbose is an alpha-glucosidase inhibitor.

My hunch is that these are actually synergestic.

And based on recent reports on resistant starch, I feel that their benefits would be not only via reducing peak blood glucose levels, but also making starch similar to resistant starch
Cancer study: Major preventive effect from resistant starch in people with Lynch syndrome -- ScienceDaily.