I currently have the CX Off-season and CX Summer Sweet Spot plans and will purchase a SBT GRVL plan. What’s the difference with the SS plans that I already have and the off-season and SS1 & SS2 plans that would normally go before a gravel specific plan? How much and how can I use of what I already have?
The cyclocross plans have some running in them which the sweet spot 1 and 2 will not have. Also there are a few more crisscross / burst workouts as cyclocross is a very explosive race. But in the long term they are not much different. You will get your gains with plenty of sweet spot work in either.