I’d say they’re comparable. With that said, if I were to give an opinion that might lean you one way or the other, I might say the CFAI Econ TTs are the way to go if that’s a weak area you want to drill a bit more.
I have done 7 mocks from Schweser, 3 mocks from IFT, all the topic test on CFAI website, and all EOC item sets from CFAI curriculum
2 IFT, 1 CFAI 2017. Most of the TT (derivatives es twice)
8 mocks
6 Kaplan practice exams
1 Live mock exam through schweser
1 CFAI Mock
12 mocks…