LT3922 vs LT3922-1

Months ago I designed a circuit for use with the LT3922. However I see it is now out of stock with most large suppliers. After glancing through the LT3922-1 it seems to be almost a direct replacement (bar some things like increased dimming resolution). Is this the case or am I missing something?

It seems strange to label it with such a similar part number without indicating what the difference is, or what -1 represents.

Thanks.