Actually, TT does have mycos in it. Label should read "Bio-toneÃ‚Â®"
This article I think sums up it's benefits rather well, with out reading pages and pages of info: https://www.mycorrhizae.com/
And since you now have both, I think it would be fun to compare the growth of the same varieties if you get a chance?
I believe in adding mycos to the soil and seedlings, and when few years back I first found Espoma products at the locally own nursery, and tried their organic seed starting mix, potting mix and their fertilizer, I was very impressed with just about everything about it.
And for mycos, I actually planning on adding BiotaMax and Mycogrow to the soil as a drench at the planting time and few times through out the season to promote health of the plants with introduction of all those fine nature's bacteria. Amounts needed are going a long way, and over the season's length appears to be very very affordable.
P.S. I think TT the most economical way if purchased in 20lb bags as Mike said, that's what I've been doing, $12.99 at the same nursery. So glad they carry all the good stuff, unlike big stores!