As a long time reloader with little H110 (used some in the early '90s for 44 Mag. loads) and no Vihtavuori powder experience, here's what I'd do; I would find load data from both manufacturers and compare data with all the other components of your proposed load. Within 2% across the board? If not, no I would not cross reference data.
The gun counter clerk acting as a reloading expert is exactly the reason I have this rule for me and I suggest it to new reloaders; pay very little (no) attention to any forum expert, range rat, gun counter clerk, pet loads website, or gun shop guru for any load data. Powder and types suggestions are welcome, but when it comes to load data (powder charges, powder profiles) I rely on published reloading manuals, with data from the manufacturer if possible. This has worked quite well for over 30 years (I'll use a powder manufacturer's website on occasion, but 98% of the time it isn't necessary).