How they compare
Both make scripted step-family fantasy scenes with adult performers, so the choice is about size, price and which network you'd rather join.
Family Strokes is TeamSkeet's flagship series and the best-known site of its kind, with a large library that's updated often and plenty of familiar names. The scripts follow a formula, and it's best bought through TeamSkeet's all-access pass, which adds the rest of the network.
SpyFam, from Porn Pros, is smaller (270+ scenes since 2017) and adds one or two a month, all in 4K with well-known performers. It costs $29.95 a month or $119.40 a year, and a $1 one-day trial lets you look first, though it renews at $39.95 a month.