Both LED and CFL bulbs come in a variety of color temperatures. You can get LED bulbs in 2700 (incandescent), 3100 (halogen), 4000 (cool white), or 5000 k (daylight). CFLs come in the same variety of color temps. Older bulbs (CFL and LED) had some odd color casts, but that's no longer true with newer CFL and LED bulbs. You can't easily tell them apart by the color alone.
Perhaps MTA traditionally bought 4000k CFL bulbs and 3100k LED bulbs (for example) in the past, but that doesn't mean new LED purchases won't be a different color temp (that matches the CFLs you've seen in service.)