Are there any updates on this variety, there is little going on anywhere…

Hello,
In France (Davidal), they say it matures 3 days after Burlat. In Spain, the IMIDA says that 1 day later, on the other hand, the maturation calendar of Viveros Ebro has the earliest variety of cherry trees (7-9 days before).
Personally I find several explanations.
1.- It is a new cherry variety, so it has not been as studied as other varieties.
2.- The needs of cold hours of the variety are very low, this helps the flowering is much ahead (15 days before burlat), in fact the owner of the cherry nursery Mariano Soria, told me that with Royal Tioga can Advance the harvest until 9 days before Burlat. The low needs of cold cause that in early zones the exit of the rest in ahead they face a lot with respect to other varieties that continue need to accumulate cold hours to flower.
3.- The climate has influence and can advance / delay its maturation with respect to another variety depending on the year.
4.- Incorrect collection of cherries, the usual color of cherries in Spain is dark red, however, R.Tioga must be collected before.

A greeting