Thank you for your interest in Bitnami. In your old WordPress deployment, did you configure any setting in Apache to enable the compression of the images? I compared the results of both sites and it seems that the size of the images is the difference between them. In case you configured something, you will need to migrate that configuration to the new one.
Please note that we configure Apache to not to read the .htaccess files due to security and performance reasons so in case you have any .haccess file, please move that configuration to the htaccess.conf file
I also checked that the new deployment fails in the leverage browser caching test. This other community thread can help you with that
I hope this helps