With the first chart, the only changes I would suggest are for the medium chart. That first red I would move up to yellow, and that first yellow I would move up to blue (like how you have it in the hard chart). Also, those red notes (palm mutes?) at the end of the medium chart I would probably move to green, since that's how you have it in the Expert/Hard chart (unless there's a good reason why they're red there). Without hearing the song, I'm not sure about anything else, but by how you charted it on expert it looks good to me.
For the bass chart, without hearing it, I'm not really sure where the emphasis would be felt, but just by looking at the notes, this is how I would break it down:
You might wanna get someone else's opinion too though, as I'm not 100% familiar with how charts are broken down for lower difficulties.Code:Expert: |-YB-YBYR-YB-YBYR|-YB-YBYR-YB-YBYR| Hard: |--B--BYR--B--BYR|--B--BYR--B--BYR| Medium: |--B--B-R--B--B-R|--B--B-R--B--B-R| Easy: |--B---Y---B---Y-|--B---Y---B---Y-|