The Samsung Galaxy S10 and S10+ recently went up for pre-order in China. According to the reliable tipster IceUniverse, they raked in twice the numbers in this process compared to their predecessors in a fraction of the same time-frame in this market. This suggests that the 2019 line is being received better than last year's already.
https://www.notebookcheck.net/First-hint-that-Samsung-Galaxy-S10-S10-are-doing-better-than-Galaxy-S9-S9-at-preorders-has-surfaced.411447.0.html