How well does Garmin syncs data between 2 devices?

Hello there,

I have a 955 and I use the Recommend Workouts as my Running Training guide.

I was thinking on getting a Venu 3 to use as my main daily watch and the Forerunner for training.

Will the 955 continue to do the Recommended Workouts and use all the data from Venu 3 or will just use the data from the 955 itself?

Thanks!