I have done both and like them for different reasons.
Leah doesnt talk too much and is more matter of fact let's get to business. Her downloads imo are different from her dvds. They are more flexible and varied for mixing and matching. When Leah tells you that you will feel this in X spot that's precisely where you feel it. She is such a pro and on a whole different level. Incredible instructor but not warm and fuzzy friendly. I'm in awe of her ability to instruct though.
Linda has an unbelievable range of downloads and dvds. She is extremely responsive to any emails and very talkative in her workouts. She has a lot of variety. She's more fun to do imo.
However i do feel that Leah is so expert in skill level bc she's so precise in her instruction. Shes unbelievably good at it. But Linda is more fun.
Hth
Casey
I just want to add that I have both of Leah's Periodization systems and there is such a wealth of material in them. I don't know how she did it. I feel they were totally worth the money.
I have probably 10 Linda dvds and downloads. They are hit or miss and some are overkill (floorwork) and some are very good. She gives you a ton of material for your money.