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The Embraer E175 and CRJ900 are large regional jets used on feeder and short-haul routes. Embraer still publishes current E175 product material; the CRJ type certificate moved from Bombardier to MHI RJ Aviation in 2020, so this review uses current regulator material for program identity.
The E175 uses a four-abreast cabin without a middle seat. CRJ900 layouts are also four abreast, but cabin dimensions, overhead-bin space, seat pitch, and first-class fit vary by operator. Check the exact airline seat map rather than treating the model name as a complete comfort rating.
Both types are commonly configured around US scope-clause limits. Existing crews, maintenance programs, lease terms, and the mainline partner's contract determine airline economics; the public sources do not establish a universal cost winner.
The CRJ900 is the longer airframe, while the E175 has the wider wingspan. Published brochure ranges use assumptions that are not directly interchangeable, so route feasibility should be checked against the operator's payload and reserve requirements.
The E175's cabin geometry is a common passenger preference, while the CRJ900 can fit an established CRJ operation. The assigned airline layout and schedule are more reliable traveler decision factors than a blanket model ranking.