TL;DR: The WD62PURZ has a better transfer rate and higher power consumption, probably thanks to a larger cache.
The WD62PURZ spins a little slower than the WD60PURZ, but it has a larger cache. Normally, a higher cache is a sign of an SMR drive, but WD gives no indication of which recording technology both drives use (CMR or SMR).
WD62PURZ specifications are very very close to the newer WD84PURZ- cache, power consumption , weight, MTBF. These are the only 2 drives in Purple product range to use a 5640 RPM spin speed.
| Attribute | WD62PURZ | WD60PURZ |
| Cameras Supported | Upto 64 HD | Upto 64 HD |
| AI Streams | 16 | 16 |
| Max Suistained Transfer rate | 185 MB/s | 175 MB/s |
| Cache | 128 MB | 64 MB |
| RPM | 5640 | 5700 |
| MTBF | 1.0 M Hours | 1.0 M Hours |
| Warranty | 3 Yrs LTD | 3 Yrs LTD |
| Power Average RW | 6.2 W | 5.3W |
| Weight | 1.58 lbs | 1.65 lbs |
