Sarchimor is not one variety but a family of lines descended from crossing Villa Sarchi with the Timor hybrid — the natural arabica–robusta cross that carries rust resistance.
The members
Obatã and IAPAR 59 in Brazil, Marsellesa in Central America, Limani in Puerto Rico, and others. Each was selected for local conditions from the same base cross.
You will rarely see these names on a retail bag; they are agronomic designations more than marketing ones.
Why they exist
The same reason as Castillo: leaf rust. Sarchimor lines let farms keep producing where susceptible varieties fail, and they yield well.
The cup
Clean and moderate — sweet, balanced, with less complexity than Bourbon or Villa Sarchi. Perfectly good coffee, and rarely exceptional.
As with Castillo, the accusation that Timor-hybrid descendants taste poor has been overstated. Well-grown Sarchimor at altitude cups respectably; grown for yield at low altitude it does not, which is true of any variety.
Catimor, for comparison
The other big rust-resistant family, from Caturra × Timor hybrid. Generally regarded as cupping below Sarchimor.
Brewing it
Filter or espresso at medium roast.