SUM has Carbonatite Deposit as well one of which is very close...

SUM has Carbonatite Deposit as well one of which is very close to CBMM,

Another project with Similar grades to Ecuador and much more:

SUMMIT TRANSFORMATIONAL BRAZILIAN NIOBIUM, RARE EARTH & LITHIUM PORTFOLIO HIGHLIGHTS:

•JUAZEIRINHO (Nb, REE),
•EQUADOR (Nb, REE),
•ARATAPIRA (REE),
•SANTA SOUSA (REE),
•T1/T2 (REE)
•HERCULES NORTH & SOUTH (Li)

So far most only know the Ecuador project.

Although the Juazeirinho project has similar Niobium grades to the Ecuador project.

Then there's SUM's Carbonatite Deposit:

SIGNIFICANT SCALE SURFACE SAPROLITE CLAY SYSTEM UNCOVERED AT ARATAPIRA

REE PROJECT HIGHLIGHTS:

• It lies between CBMM’s World-Class Niobium & ultra-high-grade hard rock REE deposit and Mosaic’s Phosphate & REE deposit, which may provide sources for REE-enriched saprolite clays at Aratapira.

• The project spans parts of the Alto Paranaíba Igneous Province (APIP), which accounts for over 97% of global niobium production and consists of major carbonatite complexes, kimberlites, lamproites, and minor alkali-related intrusions.

It's only around 12km from CBMM,
And less than 10km from Mosaic....