Most folks here wouldn't even recommend keeping two Corns together, never mind cohabbing different species.
Taiwans get considerably bigger than Corns. Whilst Taiwans aren't naturally cannibalistic, they can have voracious appetites. A Corn would most likely end up as dinner in pretty short order, once the size difference became significant.
Also, Taiwans have completely different husbandry requirements than Corns. What would be OK for one would most likely damage the health of the other.
Plus from what I've seen of Taiwans, I wouldn't view them as a good snake for a novice anyway. My ex used to keep them and his were quick to bite and they hung on for dear life once hooked to you. They get powerful when they hit adult size (anything up to nine feet) so you have to be very confident around them.