Features in MeioUpload that is not supported by Upload:
- Default error message for validations
- Regenerate thumbs
- Detection of mime type in Upload is using a deprecated PHP function. MeioUpload use others ways - https://github.com/jrbasso/MeioUpload/blob/master/Model/Behavior/MeioUploadBehavior.php#L565-593
- Use encrypted folder
- Support thumbs generation with phpThumb
- Support "unit" in max size config, ie. 10MB instead of 10240000