I think the lyretails are easier and require less feedings. I had a trio and they didn't fight as much as my Bartletts do. With the lyretails there was one male and two females and the male pretty much left the females alone. I lost them when my tank crashed and they hid in the rocks when the water level dropped. I know have 5 Bartletts in my 120, I started with 5 very small, less than an inch in size. They grew very fast and are all well over 1 1/2" and the male is upwards of two inches. The submale is very close in size and challenges the male all the time now. The three females tend to hangout together but not with the males, they are more active than the lyretails were. The male Bartlett is very striking when fully devolved and I have never seen any pics of a terminal male or have seen another in person. I didn't expect to get a terminal male in only 3 months but it looks way better than the females.