I assumed you are askign FYF off AC Web site, it is for the TD Aeroplan Visa Infinite. For example, login to altitude.aircanada.com, at the bottom of the Dashboard page, I have an ad for TD Aeroplan Visa Infinite card.
Then from the link off GCR, both cards show as FYF on the TD application page. But I guess unless you read the fine print others had mentioned above, it stated Oct 31st. It just TD decided to extended the offer but forgot to change the fine print.
If you are asking which card had the offer extended off the TD web site directly (without FYF), then it is for both cards.
Fine print is even more confusing than just dates, Platinum had words associated with Infinite. GCR says 10000 welcome plus 5000 points for first purchase yet TD site has spend of 1000 dollars. Aeroplan site still different I think. Still don't know if one can apply for both and get the bonus. Does 6 month no previous application refers to each card being applied for or any card at TD or Aeroplan cards. Consistency is hard to find across TD promotional sites.