Often it's abstraction leakage. Prime and Core coukd be coming from different outsourced design teams. TX and GX could be different base design within same OEM. Or supplieed through same middlemen hence carrying same brands. Or each of groups meet certain internal criteria. Whatever.

Customers prefer segmentation by end result rather than by implementation details, and so corporate marketing divisions sometimes try that and group products by features it offers, but that often drive-by ruins product quality.