CF + Aweber + all the Zaps you need to make it work is native to Kartra. And that's just the tip of the iceberg.
It also replaced the following for me:
Wistia, Kajabi, Intercom, Infusionsoft, SamCart, ScheduleOnce, And probably a few more that I am not thinking of.
In the end, it's not really CF vs. Kartra, cuz that's not really a fair fight software vs. software. It's Kartra vs. CF plus the half dozen other softwares and all the Zaps you'd need to set up and pay for make it a fair fight.
It's seriously a no brainer.