A shared hosting plan is intended for a single owner. No reselling is allowed on the shared hosting plans as it may affect other server users adversely. Only one control panel is provided for all the domains.
A Reseller Hosting plan is for those who want to resell hosting. Unlimited control panels are provided, one for each client account. If you require many IP addresses or SSL certificates, choose a reseller hosting plan. Also, reseller hosting account offers Web Host Manager (WHM, Plesk panel and DNS control.