we are quite old, and the fra transfer is a horror to us(fra is a horror to us). we want to travel in biz from iAd to ams. the saving with a transfer in either YYz(toronto) or dub(dublin) cuts the price by about 40%($2900 vs $4800). which is the better flight and transfer for us?

aer lingus through dubin, or air canada through toronto?? if the distances for transfer are over half a mile(20 min walk) would need transfer service.

the short piece of each (iAd/yyz or dub/ams ) is in a narrow body. not a problem for short distance.