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Has anyone noticed that with C1 the exported JPEG files are ******* huge when the slider is set to 100% quality? I'm talking 2x or more larger than equivalent Lightroom JPEG's... sometimes close to the size of a compressed Sony RAW file (40MB)!
I would assume they're not equivalent, all things being equal those smaller files from Lightroom can only be achieved by having a higher level of compression (unless they've got some amazing compression technique but that seems unlikely) regardless of how comparable the slider is between each program.
As you've got both do a direct comparison and see what the difference is in output at 100%.