Make copy of existing Joomla site (including creating new duplicate DB, do not point to current database) from current Godaddy linux hosting to Godaddy grid hosting account. Leave site on Godaddy linux exactly as is. Copy of site must be fully functional, including all extensions from the current site.
Purpose is to compare performance between Godaddy linux and Godaddy grid for the site.
HI joomla experts here - why are we charging more than anyone else? simple - quality of work and service. I would install a backup script to the old site and clone the site to the new hosting. The backup scripts stay on the site regardless of the outcome of the speedtest - the scripts give you full automated daily backups to your hosting, an external ftp or a cloud service such as Amazon and Dropbox.
I would also analyse the speed data on your old site before the tests to see if theres anything I an do to make it faster right from the start. Are you using gzip page compression and the joomla cache system on the site?
I could do this work for you in a couple of hours.
I will send you a PM to links of other Jooomla work.