HDD is a normal hard drive with the disks and actuator arm. 10,000 rpm is pretty fast for it. Normally they got 7,200 rpms.
SSD is a hard drive that uses solid-state memory like USB sticks. This technique is faster than normal HDDs but idk if it is faster than 10,000 rpm HDDs.
Btw. SSDs can burst more often than HDDs.
EDIT: Compare the data rate the HDD can read/write and the SSD can. The faster the better.