This is the multidose counterpart in Maxtreme's Tren-Ace-Max pair — the same trenbolone acetate at 100 mg/ml, presented as one 10 ml rubber-stoppered vial instead of ten sealed ampoules.
In practice the difference is handling. A vial is entered repeatedly over time, so it depends on the stopper staying sound and the solution being kept clean, while ampoules are sterile until broken and cannot be resealed. The chemistry does not change: a fast-acting ester of a non-aromatising 19-nortestosterone derivative, and the same total quantity of hormone in the box either way.