Hi,
Concerning suckers - since your tree is not grafted -, they perform as the mother plant .
I know because my ufti strain has been propagated via suckers only, and the new trees perform well. The Italian gardner gave it to a friend, that gave it to a friend, that gave it to me , and I did propagate it wia sucker as well.
So generations of suckers :) later, the tree still produce well.
Of course, depending on the exact place where you install the new tree, you can get some small/big differences from one tree to another, but that applies to cuttings propagated trees as well .
In 2013, one "sucker" of my ufti - some 3 years old sucker- did carry bigger brebas than the mother plant ... Ok it only had 4 where the mother plant had 30 ... that "could" explain the difference in size ...
As for the bud break, I have my "dalmatie" number 2 that shows a leaflet from the upper bud, where the mother plant is still sleeping - but kept between 10 and 20 figlets during the winter.
To be honest, I'm wondering if the leaf didn't show up in November and has been waiting since. But at least, the leaf is still green - so she should be alive ...
So I think that bud breaking depends as well of the maturity of the tree - old trees tending to wait more to bud break ...