You have an interesting conundrum going on.
Young haitiensus prefer warm water temps, in the 80sF.
Depending on what area it came from, bartoni come from an area in Mexico where waters can be quite cool, high 60s, low 70s.
Neither play well with others, both are omnivores and when "older" prefer a large portion of veggies in their diet in the form of algae (spirulina pellets)
A male haitiensus will easily hit 15 or more inches, so need a large tank, minimum 6ft.
Bartoni are smaller and usually go less than 10".
My haitiensus pair made a 150 gal look tiny.
My bartoni pair did fine with a few others in a 125.
male above, female below