How they compare
PervMom is Family Strokes' step-mom series: 460 long scenes with well-known MILF stars and new ones weekly. It's $32.99 a month or $149 a year, and that includes the whole Family Strokes network; $365 a year buys every Paper Street network.
Pure Taboo does taboo roleplay with more story and acting, about 640 scenes, sold through Adult Time for $19.95 a month or $143.40 a year, which adds Adult Time's 60,000+ episodes.
If step-mom scenes are what you want, PervMom has more of them; if you want drama and a much bigger library for the money, Pure Taboo with Adult Time is the better deal.